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Friday
Feb132015

Safe Landings: February 2015

Ground Loop Lessons

By definition, a ground loop is the rotation of a fixed-wing aircraft in the horizontal plane while on the ground. It is predominantly associated with aircraft that have conventional landing gear (taildraggers) due to the center of gravity being located aft of the main gear. If horizontal rotation is all that happens, the ground loop may only affect the landing gear or cause a runway excursion. Unfortunately, aerodynamic forces can cause the advancing wing to rise, which may then cause the other wingtip to contact the surface. A ground loop that progresses to this stage may result in extensive airframe and engine damage and even personal injury.

While often caused by an unfavorable wind component or adverse runway conditions, ground loops may be caused entirely by pilot error. 

To avoid a ground loop, the pilot must respond to any directional change immediately while sufficient control authority is available to counteract the unwanted movement. In order to respond quickly enough, taildragger pilots have to anticipate the need for corrective control input. This means keeping ground loop countermeasures in mind whenever the aircraft is moving. 

To reinforce the need for taildragger pilots to keep the nose ahead of the tail, this month’s CALLBACK looks at three ground “oops!” incidents. Note that while these reports emphasize the particular need for vigilance in training scenarios, the basic techniques noted apply to all taildragger operations.

Errant Cub Strikes PAPI

This J3 Cub instructor’s observation that, “we were comfortably in control right up to the point when it became clear…we were going to depart the runway” emphasizes the need for constant vigilance in a taildragger.

I was…flying from the front seat. An ATP rated pilot was the student for tailwheel training, flying from the rear seat. We did two landings and takeoffs from a small grass field several miles from our home airport. The day was clear with very light winds, essentially calm. We returned to our airport for our final landing. 

The student had done well with his earlier landings, and I felt comfortable having him make this landing also. I briefed that a pavement landing was more challenging than grass and required even more precise directional control… We had previously discussed the center of mass location relative to the main gear and how that causes a ground loop tendency in tailwheel aircraft if the aircraft is not aligned with the direction of travel or is drifting at the time of touchdown. The final approach segment was flown precisely on speed and on glide path. As we neared touchdown and were into the landing flare, I noticed that the airplane began drifting very slightly to the right. It was my impression that the degree of drift and the alignment of the aircraft for landing were within safe limits and therefore, I continued to monitor the landing, letting the student maintain full control.
 

After we touched down, just at stall with the stick full aft, the aircraft began to turn gradually left. I began to assist the student on the flight controls and then said, “I have it” as the rate of turn increased. Despite full right rudder and brake, the turn developed into a progressive swerve to the left. I do not recall if I added left aileron. I noticed a small amount of power still on, and I took this out. We left the runway between the runway lights and continued to roll onto the grass. The radius of the turn tightened, and I began to see the PAPI lights to our left… As the turn continued, we went past the first three lights and slowed, but the radius of the turn tightened despite all control inputs. We struck the fourth PAPI light.

We were moving so slowly at the time of impact that we did not feel a discernible force. I checked the brakes, bungees, and tailwheel. All seemed to be intact and functional. I initially wondered if there could have been a mechanical problem because the degree of side movement seemed to be in an acceptable range at touchdown, and I was surprised by the ground loop. We did subsequently note that the tailwheel springs and linkages were somewhat loose. I have made thousands of tailwheel landings and felt this time that we were comfortably in control right up to the point when it became clear the swerve was increasing and we were going to depart the runway. I have to conclude this was mostly pilot error for not fully recognizing that lateral limits had been exceeded, perhaps exacerbated by a somewhat loose tailwheel steering linkage.

“Never Relax Your Vigilance”

The type of aircraft was not given in this report, but the lessons given are good for any taildragger. Also, the importance of not overestimating a student pilot’s ability is good advice for instructors in any type aircraft.

This was the first flight of a tailwheel endorsement for a previously endorsed pilot who had lost his documentation. He had approximately 100 hours of tailwheel time… Two hours of ground school was accomplished covering tailwheel aircraft and model specific characteristics. The start and taxi, including control positioning, was normal. The takeoff was somewhat erratic in that the control yoke was “pumped” slightly; rudder control was erratic, but satisfactory. Slow flight at various flap settings and stalls were accomplished. On the first pattern, downwind to final was satisfactory, but he elected to use 30 flaps instead of 40. As the flare was initiated, he “pumped” the yoke initially, but quickly established a proper attitude. As the aircraft touched down he relaxed backpressure and over-controlled the rudder causing a minor heading change. He then reversed the rudder, adding backpressure and causing the aircraft to become airborne and change direction. At this point, I commanded him to hold the yoke with a nose up attitude and center the rudder; however, he relaxed backpressure, allowing the aircraft to touch down. His rudder input at this time was excessive (push and hold rather than the quick inputs required for a taildragger). 

I took control of the aircraft (at this time we were very slow), but I could not override his rudder input in a timely manner. The aircraft did a slow ground loop, exiting the runway. It was more of a quick turn than a classic ground loop. I reentered the runway and taxied back to the ramp to perform an inspection. There was nothing wrong with the aircraft or tail wheel assembly.
 

I have about 5,000 hours of instructor time with no incidents/accidents and have trained many pilots, but I committed a cardinal sin in having higher expectations for this pilot than warranted based upon his experience. Could this have caused me to relax my vigilance? It probably did… When the student started pumping the yoke at the initial round out, I should have taken the aircraft and performed a go-around. I also did not demo the first landing, which is usually my method of operation.
 

This event reiterated the fact that a demo is also appropriate for someone who has never flown a particular model and [I should] never fail to take timely control of the aircraft, even though someone has extensive experience. Never relax your vigilance.

Wayward WACO

Even a very experienced instructor pilot might not be able to overcome a student pilot’s error when it involves a critical action at a critical time. The situation is aggravated in an aircraft such as this WACO where the instructor was unable to see, and possibly anticipate, the student pilot’s actions.

The objective of the flight was to practice takeoffs and landings on a paved runway, which is more difficult and challenging than operations from a turf runway in a vintage aircraft of this type… The decision was made to practice at a nearby field where there is a 150-foot-wide runway. 

A key point in technique that had been stressed…was not to touch the brakes until the tail wheel was on the ground when making a wheel landing. Moreover, one should not try to force the tail down once on the ground in the wheel landing attitude but rather let the tail come down on its own, maintaining directional control with the rudder only; no brakes during this phase of the landing roll out.
 

The point had been previously stressed and understood by the student that forcing the tail down (pulling it down with the stick) prematurely was a good way to induce a ground loop because this action would dramatically increase the angle of attack on the wing when it still had enough speed remaining to generate some lift and enough lift, if helped along by any crosswind, to cause the aircraft to yaw and thereby cause the downwind wing to hit the ground and begin a ground loop event. Application of brakes while the tail was still flying could also cause enough adverse yaw to induce a ground loop or even worse, flip the aircraft over.
 

Conditions at the time were ideal. Wind was less than five knots. When the airplane touched down on the main wheels, directional control was good, and it was tracking straight. Then it began to yaw to the right as speed decreased and the tail began to lower. This is a critical time where the pilot flying needs to immediately arrest the yaw with opposite rudder even if aggressive opposite rudder is necessary but no brakes. Instead, the student hit the left brake fairly hard.
 

Now the right yaw, which was only about 10 degrees, suddenly became a sharp yaw to the left at about 45 degrees. At this point, the airplane was headed off the runway onto the grass, and it struck a runway light where it departed the runway. The critical error was that the student stomped on the left brake when the aircraft began to yaw to the right while the tail was still flying.
 

This is an antique aircraft. The instructor pilot sits in the front cockpit. The instructor cannot see what the flying pilot is doing with his feet or how he has them positioned on the rudder pedals.

Friday
Jan092015

Safe Landings: January 2015

“The Airplane was still in a Descent with Full Power”

Faced with little IFR experience, poor CRM, and airframe icing, the pilots of a Rockwell 112 were lucky to break out into conditions that would allow the ice to dissipate. Among the lessons this incident highlights are the need for an adverse weather “escape plan,” and the value of building actual instrument time with a qualified instructor until proficiency is attained.

• Sunset was imminent, this area of the country was new to me, and the more things changed for the worse, the more interest I had in parking the airplane and just spending the night in a hotel.

Always leave an out. The area over the airport…was in IMC. Ordinarily this would not have been an issue. The AWOS indicated a 1,500-foot ceiling. Things were going smoothly then at 6,000 feet, with no control input to cause a descent rate of more than 500 feet per minute, my VFR rated passenger told me that we were descending (I could see that and was trying to process why we were descending). He further stated that I needed to “fly the airplane.” Then he took the controls and pulled back on the yoke. The attitude indicator shifted to a very sharp indication of a left turn. The descent rate increased to about 1,500 feet per minute. I could not over power this person. I told him, “The airplane was flying a minute ago; let the airplane continue to fly.” He let go of the controls. I reiterated that announcing, “Your airplane/my airplane” prior to manipulating any controls was a requirement when flying with me.

The airplane was still in a descent with full power after he released the controls. It took a while to discover that we had ice on the wings. We broke out into VMC and ATC asked what my intentions were. I explained that I needed to stay VFR to dissipate the ice and would like the approach into [a nearby airport].

I do not have much experience as an IFR pilot, less than 20 hours in actual IMC. I thought my passenger, with more than 50 years of aviation experience, would be an asset in the cockpit. In VMC, he is a continuing source of information and a person I respect. But there is a difference between being IFR rated and VFR rated…. Being diverted 59 miles south due to the iced over runways was already putting me outside of my comfort range. I usually fly in [warmer states].

The majority of my flight instructors had minimal or no experience in actual IMC. I will be signing up for a course on “icing” in the near future.

 

“The Airspeed Was Decreasing Rapidly and I Began to Worry”

ATC helped to get a trio of pilots in a PA32 out of trouble as they dealt with zero IAS, no GPS, and ice on the leading edge of the wings. FAA and NTSB statistics show that accidents often result from similar scenarios, especially when “get-there-itis” is added to the mix.

• We decided to depart knowing that most of the flight would be VFR, but the last 100 miles would be in marginal conditions. We planned on stopping prior to encountering the marginal conditions…. Once at [the interim stop], we refueled and obtained a telephone weather briefing. For the briefing, I had one of the other pilots call the briefer. We spoke about the information the briefer gave him. We were told that the freezing level was at the surface and above. Our understanding was that other aircraft were not having problems with icing, but were experiencing moderate turbulence.

At this point, my mindset was that icing could happen but would not be an extreme hazard to us. I spoke with the owner of the airplane, (our passenger) and told him that as soon as we got any accumulation of icing, we would divert to an airport that was along our route. We chose our route with that plan in mind.

Another pilot performed the pre-flight. Thirty minutes after departure, the weather became marginal, and I avoided IMC while we got an IFR clearance from TRACON. We were cleared to climb to 7,000 feet to see if we could find VFR conditions. During the climb, we started to notice icing. We then climbed to 8,000 feet, but we were still IMC so we asked for 6,000 feet.

At 6,000 feet, I noticed that the airspeed was decreasing rapidly, and I began to worry. For a while, I thought we were losing the capability to generate lift due to the icing, and by instinct, I reacted by reducing the pitch of the aircraft to avoid a stall. At this point, the other pilot suggested it was the pitot tube getting clogged by the ice, which was the cause of the IAS decrease. I then noticed that our altitude was now 5,300 feet MSL….

While all of this was happening, the pilot beside me was attempting to coordinate with ATC to help us get back down to an airport…. The Controller gave us an Initial Approach Fix and told us to fly direct to that fix. As we were loading the information into the GPS system, we realized that the GPS had lost its signal. With IAS at zero, no GPS, and ice on the leading edge of the wing, we thought it would be best to get vectors to the nearest airport…. Flying at a lower altitude in VMC helped us regain the airspeed indicator and land in visual conditions.

The one factor that hurt us the most was “get-there-itis.” I had been asked to help out the owner with the flight since I had more experience than he did. The owner was spending a lot of money for each night at a hotel and wanted to get back soon.

I should have been more involved with the pre-flight and weather briefing and not just taken the other pilot’s word since I am the PIC. I also just assumed that the pitot heat was working since I assumed it was the responsibility of the owner to ensure that the plane was up to date on maintenance.

Low Level Ingestion

After experiencing a flameout and “vigorous” relight on one of the engines, a BE100 pilot was able to regain control after breaking out of the clouds. There was no mention of how low the airplane descended, but since a “climb to 3,000 feet” ensued, this was undoubtedly a chilling lesson on the dangers of engine inlet icing.

• Before the final turn for the ILS approach, with all deicing equipment on, the right engine seemed to stutter. I assumed it was the right engine from the direction that the plane was suddenly going. I corrected with left aileron and rudder. I did not see a decrease in torque with either engine when I looked at the gauges. The engine restarted vigorously and pushed the plane hard left and into a fast descent. I was able to control this just as I broke out of the clouds. I climbed to 3,000 feet, stabilized the plane, and made the approach without further incident.

After landing, I observed that the inlet to the right engine was clear of ice. The inlet to the left engine was significantly blocked by ice buildup. I suspect that the right engine flamed out, caused by ice breaking loose and entering the engine. The igniters were armed, which restarted the engine.

A possible cause is that I did not have the engine inlet heat system on soon enough to avoid ice buildup. I was watching the wings during flight and turned on the engine inlet heat system only after I observed ice on the wings. The icing was encountered at 5,000 feet enroute. There was no icing in the immediate vicinity of the destination airport.

Thursday
Dec112014

Safe Landings: December 2014

Crossing the Line: Runway Incursions

Runway incursions, a top FAA safety concern, are formally defined as “any occurrence at an aerodrome involving the incorrect presence of an aircraft, vehicle, or person on the protected area of a surface designated for the landing and takeoff of aircraft.” Pilot deviations, air traffic controller operational incidents, and ground vehicle deviations can cause runway incursions. Examples of these errors include:

Pilot Deviations

  • Crossing a runway hold marking without ATC clearance

  • Taking off without clearance
  • Landing without clearance

 Controller Operational Incidents

  • Clearing an aircraft onto a runway while another aircraft is landing on the same runway
  • Issuing a takeoff clearance while the runway is occupied by another aircraft or vehicle

Vehicle (Driver) Deviations

  • Crossing a runway hold marking without ATC clearance

Regardless of whose actions caused it, the inappropriate or unauthorized presence of an aircraft or vehicle on an active runway can lead to serious consequences. The following ASRS reports offer insight into some of the human factors and other issues involved in runway incursions.

Primed and Ready for an Error

Expectation bias, fueled by familiar precursors to a “line up and wait” clearance, led this B737 flight crew to enter the runway prematurely.

• We were holding short of Runway 06L and takeoffs and landings were being conducted on the runway. The Captain had mentioned that he had a commute to catch at [our destination] and we were issued a wheels-up time. The aircraft ahead in the run-up area was cleared for takeoff. I glanced right, saw the next arrival for the runway and thought we might be able to get out before him if we got clearance right now. The Captain released the parking brake to inch forward to the hold-short line since the aircraft ahead had departed.

As we were rolling, the Tower Controller issued instructions to amend our departure. I read them back and then focused my attention on the automation to reset the departure…. As I looked back outside the aircraft, I saw that we were lining up on the runway. As my focus had been inside the airplane, I did not immediately perceive any error. I then tried to think back whether we had been cleared to line up.

As we lined up, ATC instructed another aircraft to go-around. It then clicked that we had never been cleared to line up and wait. The Captain then also realized his error. Some factors included how ATC worded the departure amendment in a way that sounded like the precursor to a line up and wait or takeoff clearance. Another was glancing at the next arrival.

Since our wheels-up time had come, my mindset was that we were next and had enough room if we got clearance to take off right away. When ATC issued the departure amendment, the aircraft was already rolling forward as my head went down. I felt aircraft movement because we had been creeping forward, but I did not realize how far we had gone before putting my head back up.

Eighty Degree Error

A PA28 pilot learned a lesson about the importance of a basic sense of direction or the use of basic navigation equipment in selecting the correct runway. The incident also serves as a reminder to Tower Controllers to be aware of the possibility that a pilot is approaching the wrong runway when an aircraft doesn’t show up where it is expected to be.

• Approach Control reported radar contact and gave me visual approach instructions for landing on Runway 14. Approaching from the east, I had [the field] in sight from about 10 miles out. From the moment I had the field in sight, I incorrectly viewed Runway 06 as my assigned runway. I had the Airport Diagram on my kneeboard. I simply failed to identify the assigned runway with my heading indicator, compass, or other ground references.

The Approach Controller advised that the Tower Controller’s Radar was inoperable. I was asked to report a two-mile left base for Runway 14. I actually reported a two-mile left base for Runway 06. I was cleared to land on Runway 14, but I continued for Runway 06. On final, the Tower Controller advised he did not have me in sight. As I was touching down on Runway 06, the Tower Controller asked for my current position and I advised I was touching down.

I believed I was landing on Runway 14; however, I was clearly flying to the northeast. As a new private pilot with [about 100] hours of experience, I failed to properly plan for and make accurate decisions on this approach and landing. I should have been much more concerned that the Tower Controller did not have me in sight. Although I was cleared to land, the better decision would have been to execute a missed approach and land only after the Tower had me in sight.

Right Runway… Wrong Airport

In some instances, landing on the correct runway is only half of the problem. You also have to land at the correct airport. A TRACON Controller and a low-time private pilot reported their perspectives on an excursion to a distant incursion. It should be noted that ASRS reports indicate high-time pilots are also susceptible to this type of visual distraction, particularly on night approaches. 

Controller’s report:

• Pilot was cleared for a visual approach to Runway 18 and was told to follow traffic. The pilot said that he had the traffic in sight and would follow the traffic. He then descended and landed on Runway 18 at an airport six miles north. When the pilot called the TRACON, I asked him what happened. He advised that when he turned behind the traffic to follow, he was lined up perfectly for Runway 18 at the other airport, got focused on the runway, and just landed there.

Pilot’s report:

• I was on an easterly heading northwest of [destination] at 3,000 feet MSL. I was cleared for the visual to Runway 18 and told to follow a King Air. When I turned to the south, I misidentified Runway 18 at [a nearby field] as Runway 18 at [destination]. The runway lights were illuminated on Runway 18 at [the other airport]. I lost visual contact with the King Air and proceeded to land on Runway 18 at the wrong airport. This mistake could have been avoided by flying the approach to Runway 18 at [destination] using the navigational equipment available in the airplane.

Follow That Plane

Taxi clearances that include instructions to follow a preceding aircraft can be problematic. In the following report, a Ground Controller advised that he “should not have relied on the pilot to follow the preceding aircraft.”

• When we are using Runway 06, our taxi routes get quite complex and Runway 18R is used as a taxiway. A Grumman was given instructions to taxi via Echo, Runway 18R, and Hotel, Cross Runway 18L. I provided him with progressive taxi instructions as he was taxiing. A Cessna called up right after him and was given the same taxi instructions. The Cessna was also instructed to follow the Grumman and reported it in sight. The Cessna was taxiing on Runway 18R as expected and was approaching the turn onto Taxiway Hotel, which runs adjacent to Runway 06. I was distracted for a moment and then the Local Controller said the Cessna missed his turn and was going onto the runway. The Local Controller had just cleared the Grumman for takeoff, but was able to stop the aircraft in time.

I instructed the Cessna to hold position and informed him that he missed Taxiway Hotel and had taxied onto the runway. I then instructed him to make a “180” and turn left on Taxiway Hotel. After listening to the recorded transmissions between the Cessna and myself, it is apparent that he did not read back the taxi instructions correctly, and I failed to hear the readback and correct him. Knowing that Runway 06 operations are tricky when it comes to taxiing, I should not have relied on the pilot to follow the preceding aircraft. I believe that by the pilot agreeing to follow the aircraft, it allowed me to relax and miss errors in the readback.

Head to Head with a Snowplow

Seasonal deterioration of airport weather conditions increases the need for taking runway condition readings and removing snow. The chance of runway incursions by the associated airport vehicles also increases. In the following report, a PC12 pilot had a face-to-face encounter with a snowplow when it was too late to reject the takeoff.

• The field conditions were snow depths of .5 to 1.0 inches and braking action fair to poor. Prior to takeoff, I made a radio call on the CTAF that I was taxiing to Runway 30. I saw a snowplow on Taxiway A. I did not hear any ground vehicles using the CTAF. I heard a Metroliner transmit on CTAF their intentions of landing Runway 30. We had a brief two-way communication and agreed that I would hold short of Runway 30 on Taxiway B, at the approach end of Runway 30, for the Metroliner landing….

I watched the Metroliner clear Runway 30 then switched my radio to ATC and received my IFR Clearance. I switched back to CTAF and, prior to entering Runway 30, transmitted my intentions for takeoff. Visually checking the final approach path and the runway to be clear of traffic and hearing no traffic on CTAF, I commenced the takeoff. During the takeoff roll, a snowplow entered Runway 30 from the crossing runway. The snowplow turned right, making a 90-degree turn towards me. When I saw the snowplow pull in front of me, I was at rotation speed and continued the takeoff. I would estimate that I crossed over the snowplow by 100 feet vertically and less than 50 feet horizontally. There were no NOTAMs for snow removal that morning. I did not hear any airport personnel utilizing the CTAF.

 

 

 

Thursday
Nov132014

Safe Landings: November 2014

Non-Towered Aircraft Operations

At an airport without an operational control tower, sometimes referred to as an “uncontrolled” airport, communication is one of the key elements in maintaining proper aircraft separation. Use of the Common Traffic Advisory Frequency (CTAF) helps to assure the safe, orderly flow of arrival and departure traffic. FAR 91.113 cites basic right-of-way rules and FAR 91.126 establishes traffic-flow rules at non-towered airports. The Aeronautical Information Manual (AIM) and FAA Advisory Circular 90-66A expand on these regulations to define procedures for operations at non-towered airports. Staying visually alert is the final measure of defense against aircraft that may be operating without a radio or without regard to the standard non-towered airport procedures. The following ASRS reports highlight some of the problems commonly associated with non-towered airport operations.

Unexpected Opposition – Two Opposite Runway Takeoff Incidents

A C680 Flight Crew had to abort their takeoff when an aircraft made an unannounced departure on the opposite runway. It is not known if the “other airplane” failed to use a radio or did not have one. For aircraft without a radio installed, the use of a hand-held transceiver is highly recommended at busy non-towered airports.

After boarding passengers and starting engines, we notified [Departure Control] that we were ready for [IFR] departure on Runway 17. We were informed that there would be a delay if we used 17, so we decided to depart on Runway 35 to avoid the delay since winds were calm. There was one aircraft that departed Runway 17 as we were taxiing to Runway 35, but we did not hear or see any other traffic. We were released by Departure from Runway 35 at which point we visually cleared the area left and right and transmitted on CTAF that we were departing [Runway] 35. We did hear another aircraft arriving from the north about six miles away, but did not see it. After takeoff we were to make a sharp left turn and knew the traffic would not be a factor. As soon as we took Runway 35 and advanced the power for takeoff, the Co-Pilot called, “Airspeed alive” and then said he saw an airplane far down the runway. I yelled, “Abort” below 50 knots. We watched the other airplane lift off and sidestep slightly to the right as we exited the runway. [It]…passed abeam us by about 400 feet. We never heard anything else on the radio.

In another example of “unexpected opposition,” the pilot of an experimental aircraft encountered opposite direction traffic that failed to announce a departure against the flow of traffic.

Calm winds prevailed on arrival…. I landed and refueled. The calm wind runway at [this airport] is Runway 15. I prepared to take off and announced I was holding for 15. Inbound traffic started to announce entering the 45 for Runway 15 and one aircraft announced turning base on Runway 15. I broadcast my departure on 15 and rolled. Another aircraft came into view rolling on Runway 33. I sidestepped to the west of the runway approximately 50 feet. When the other aircraft saw me, he then sidestepped to the east. I announced that two aircraft were departing in opposite directions from Runway 15 and 33 to alert other traffic. Other traffic acknowledged. The departing low wing aircraft then announced that he was crosswind on Runway 33 and I announced I was crosswind on Runway 15. We went our separate ways. I estimate we passed each other by about 250 feet. The other aircraft was not using his radio and was not following local procedure to use [the] calm wind Runway 15.

Over the Top

An alert C182 pilot was wise to keep an eye on another pilot who was not communicating and apparently not paying attention to other traffic.

I was taxiing for takeoff…. At the entrance to Runway 18, I saw that the windsock showed light wind from the north. I saw an aircraft in the run-up area of Runway 36. I announced on CTAF that I would back taxi on Runway 18 to the intersection of Runway 18 and the taxiway and would then exit the runway. While back taxiing, the aircraft in the run-up area of Runway 36 taxied onto Runway 36 with no radio call. I announced on CTAF again that I was now back taxiing on Runway 18 with no response from the other aircraft. The aircraft on Runway 36 then commenced takeoff with no radio call. I moved to the right as far as possible and stopped at the edge of the runway. The other plane rotated over my aircraft.

Say What?

Using the CTAF to announce one’s intentions and to listen for other aircraft is the best means of preventing traffic conflicts. This M20 pilot had a frustrating encounter with another pilot who chose not to use the radio for a rather dubious reason.

On crosswind for Runway 9, I saw another aircraft departing Runway 23. I had heard no radio traffic, so I called on CTAF to see if he had his radio on; no response. I then flew downwind, base and final but could not see the other aircraft and there was no radio traffic on the CTAF. Just as I was about to touch down, the other aircraft crossed the intersection of Runways 5-23 and 9-27 about 1,000 feet in front of me as he landed on Runway 23. We were both landing simultaneously on intersecting runways. After shutting down, I walked to the other pilot’s hangar and asked him several questions: “Do you have a radio in your plane?” 
“Yes.” 
“Do you keep it turned on?” 
“No” 
“Why not? We just about collided out there.” 
“I can’t hear it because of my hearing aid.” 
“Why don’t you get a headset?” 
“I have one. It doesn’t help.” 
“Did you realize that we were both landing and almost hit?” 
“Oh, were you landing?”

Intersection Near Miss

Bear in mind that while you follow all of the recommended procedures for non-towered airport operations, other pilots may not. This C172 pilot learned that keeping a good lookout is a major part of the “defensive flying” required at these airports, especially when there are intersecting runways.

The winds were from 310 degrees and slightly favored Runway 27. However, Runway 27 required a back taxi full length from the GA ramp, and there is a taxiway available to Runway 36. I elected to depart on Runway 36 due to the taxi options. I was monitoring the CTAF frequency all the way from the GA ramp to Runway 36. I announced on the CTAF frequency that I was departing Runway 36. I heard no announcements from other aircraft while taxiing, during engine run-up, or on takeoff. On takeoff, my wife, who is a pilot, called out another aircraft on Runway 27. Then I saw the aircraft and at the same time, someone called out the possible collision on CTAF. I decided I had enough airspeed to rotate. I lifted off and banked slightly to the left to miss the aircraft rolling through the runway intersection. We missed, but it wasn’t by much.

Because the C172 is a high wing aircraft, my view of Runway 27 was restricted after lining up on Runway 36. It is my guess that the other aircraft landed long on Runway 27 to reduce his time to get to the ramp. I have no idea how he approached Runway 27.

“We Missed by Maybe 30 Feet”

In another intersection near miss, an M20 pilot used the correct communication procedures, but failed to react to the visual alert from a cockpit passenger.

I took off from Runway 19, which was favored by the wind direction. Runway 19 has a displaced threshold due to trees on the approach. I did a run-up on the pavement between the ramp and the runway. I transmitted on CTAF (which I had used to speak to another pilot on the way in, so I knew it was the correct frequency) that I was entering Runway 19. Shortly after, I announced that I was departing from 19 and began the takeoff roll. I did not notice the aircraft on the run-up area next to Runway 27. I had accelerated to about 60 knots when I saw the other aircraft turn onto Runway 27 and begin either a taxi or takeoff roll, crossing directly into my path. I took evasive action. I don’t believe he did. We came very close to colliding (his propeller with my left wing). We missed by maybe 30 feet. I did not see the other aircraft until it was almost too late. I don’t know why I didn’t notice it. My 16-year-old son started pointing, but I thought he was pointing to a deer or debris or something. Perhaps I was fixated on the runway surface. The taxiway leading to Runway 27 turns south into the run-up pad for 27, so a pilot doing a run-up in preparation for takeoff on 27 is facing south and cannot see the start of Runway 19 behind him. (But when he/she turns onto 27, Runway 9 is clearly visible). The pilot of the other aircraft was not on CTAF, did not hear my radio calls and failed to check before crossing an active runway.

 

 

Monday
Oct202014

Safe Landings: October 2014

Fuel Management Errors

Fuel management errors continue to account for a significant percentage of the General Aviation forced landing incidents reported to ASRS. However, since fuel exhaustion and fuel starvation events often result in significant aircraft damage and personal injury, an even greater number of fuel management errors result in NTSB accident reports. 

The following ASRS reports offer sobering lessons from pilots who have “been there, done that” and, fortunately, survived to share their experiences. Top off your fuel management wisdom by learning from these fuel management mishaps.

In a Position to Fail

This Twin Piper pilot learned that “close” is not good enough when it comes to positioning fuel tank selector switches.

■ While flying solo on an IFR flight plan in a rental Twin Piper approximately 20 nautical miles to the east of my destination, I was cleared to descend from 8,000 feet to 6,000 feet. At this time, I was in IMC with light rain. As part of routine pre-landing checks, I switched both left and right tanks from Auxiliary to Main. As I was reaching 6,000 feet, the right engine started to run rough for a few seconds and subsequently failed. Since I was in the landing phase of the flight, there was no time to complete the “cause check” procedure. When ATC asked me to maintain altitude, I responded, “Unable” and explained that I was on one engine only. At this time, I was in VMC. I squawked 7700, declared an emergency, and requested vectors to the nearest airport. ATC vectored me to a nearby field, advised that I could land on any runway, and switched me to Tower frequency. Tower immediately cleared me to land. I maintained a safe airspeed, lowered the landing gear and flaps, and landed uneventfully. The next day, I found that although the fuel selector had been set to the Main position, the engine was still drawing fuel from the auxiliary tank, which had eventually emptied and led the engine to fail due to fuel starvation. Apparently, the fuel selector valve had not been positioned completely in its detent position (close, but had not “clicked”). This incident was a good lesson learned, and I have become more alert and diligent to ensure the fuel selector valves are properly positioned when using them to switch between tanks.

An Inconvenient Truth

A faulty recollection of the last flight influenced this C180 pilot’s optimistic interpretation of the aircraft’s fuel gauges. Although somewhat inconvenient, visually checking the fuel tanks could have prevented an even more “inconvenient” forced landing.

 The engine quit for (at the time) unknown reasons. I turned toward lower terrain while slowing to best glide speed. The area was mountainous with thick timber and mixed clear cuts, none suitable for landing. About five miles west, I chose a pasture and made a forced landing with no aircraft damage or personal injury. After my nerves settled down, I investigated the cause and found it to be fuel exhaustion. I thought I had pre-flighted the aircraft carefully. I had checked both right and left fuel gauges and believed them to be reading FULL. The gauges are original equipment for a Cessna 180 and were working properly. The problem is the gauges are built with EMPTY and FULL both on the bottom of the gauge, very close together. I also think the needles can go below EMPTY in certain attitudes, which would put them closer to the FULL marks. When [the tanks are] full, the gauges can go above the FULL mark, which would put them closer to the EMPTY mark. My last flight was almost three months prior and was a long one, landing not too much above FAA minimum fuel remaining. I mistakenly thought my last flight had been from my local fuel stop after filling up, which is the normal way I park the airplane. I was airborne around 30 minutes, which would fit with the fuel to be expected after the actual last flight. What I learned was to do a better preflight and watch out for the fuel gauge problem. The fuel gauges bounce around starting at about 1/4 tank and go to “0” when parked in the normal ground attitude. I did not check the tanks visually, which I will try to do any time the fuel gauges are not in the middle. The Cessna 180 tanks are hard to check (high wings made worse by large tires and the lack of any steps to climb up on in case a ladder is not available). My wish list includes better aftermarket fuel gauges for the aircraft and a better brain for me.

A Self-Induced Surprise

After inadvertently switching both tanks “OFF,” a Light Sport Aircraft pilot was fortunate to have plenty of runway remaining when the engine quit less than 200 feet in the air.

■ Having very recently completed my CFI renewal, BFR and Light-Sport Aircraft checkout at an FBO, this was to be my first solo flight in about a decade. Because of these circumstances, I was being very deliberate and careful in everything I did. The aircraft was the same one that I had flown for my BFR the week before. I had noted that the aircraft had a rather complex fuel system for a simple high-wing aircraft. It featured both engine-driven and electric fuel boost pumps and an independent fuel shutoff valve for each wing tank located on the respective windshield pillars. According to the checklist, the valves (small “batwing” types) are “OFF” at engine stop and, obviously, “ON” for flight operations. Additionally, the engine back-feeds surplus fuel to the right tank only, which introduces fuel management issues…. I had noted to friends that this seemed a bit complex for an LSA-class pilot and aircraft, but obviously (I thought to myself), not for ME. On preflight, I noted by visual check that the left tank was full and the right, brim-full. Since I knew that any excess returned to the full right tank would simply spill out the overflow tube, I started to think about “managing” that environmental issue, so after startup, I positioned the selector valves to draw off the right tank only during taxi and run-up. Because I had noted that there were no fuel tank items on the Before Takeoff checklist, I would have to remember to recheck/reconfigure the fuel selectors.

After more than 50 years in aviation, I thought I could remember to do this, and I did, just before taking the runway. With that mentally checked off, I rechecked the other items (flaps and trim, engine gauges) as I lined up. The [aircraft] leapt off the ground in a few hundred feet. Somewhere between 100 and 200 feet, the engine sputtered and quit. After a fraction of a second of disbelief, having never had a complete power failure before (let alone on takeoff), I dumped the nose and landed uneventfully well before the first turnoff. 

As I rolled out I wondered, “Why?” There was no mixture control or carb heat on this engine, the Aux Fuel pump was on, and I knew I had checked and reset the fuel selectors. I looked at each windshield pillar and noted with satisfaction that they were both similarly positioned. Then to my astonishment, I processed what I was seeing; they were both “OFF”! I turned them back on, turned the key, and the engine was running again…. 

It was obvious “what” had happened, but it took about two hours after the flight for me to suddenly realize “how.” As I ran back through my thought processes at run-up, I realized that because all my thinking about the fuel situation was focused on the right tank, when the time came to reconfigure, I moved the “RIGHT” (wrong!) fuel selector, which of course had been “ON” to burn some excess fuel while the left was “OFF.” I turned the right tank “OFF” because my brain had become fixated on changing the right tank, rather than on both tanks “ON.’” While I’m hardly surprised that I could make a mistake, I was astonished that I could make THIS one. 

I fully understood the fuel system and its selectors. While it is a bit complex for a simple aircraft, and in some respects the system design helped me make this mistake, I’ve logged substantial flight time in…many other aircraft with more complex fuel systems than this one, and never had a single self-induced fuel system surprise. Nor was I rushed or over-confident on this occasion. I wish I could remember whether I physically LOOKED at the fuel valves as I took the runway or whether I just mentally checked off “good to go” for that system. I hope it was the latter. I can’t imagine that actually “seeing” both valves horizontal wouldn’t have rung my bells. My take-away from the affair is not a new one for me or for any airman. Look AND think about each checklist item, especially the potential killers.

Nine Gallons Short of a Stetson

Two C172 pilots did not receive the 10 gallons of fuel they paid for and subsequently learned a lesson about the need to verify the amount of fuel on board. But given the fuel required for the one-hour reserve, perhaps their calculation of the fuel needed for the flight was also a bit short.

■ During an instrument flight lesson we decided to add 10 gallons of fuel to meet the club requirements of one-hour reserve. We requested 10 gallons of fuel with ramp personnel and the FBO front desk. We went in and flight planned, and in approximately a half hour, we paid our fuel bill for 10 gallons and departed. We thought we had the fuel, but we experienced an engine out on short final followed by an emergency landing. We received a phone call from the FBO the next day stating that the fuel uplift was in error and that we received only one gallon as opposed to the ten gallons we paid for.

 

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