Accident Probes

• The Big Picture
• Top Ten Tips
• Trim Runaways
• Disoriented
• Bounced Landings

It fascinates me that many GA pilots of single-engine airplanes cruise at such low altitudes. Theyre apparently oblivious to the fact that they are flying behind a single engine and if it fails you are on short final to somewhere! Extra altitude not only increases your radius of action, it also adds extra time for trouble shooting (which might eliminate the initial problem altogether) and increases the probability that a Mayday call might be heard. The side benefits include greater aircraft efficiency, cooler temperatures in the summer and possibly a smoother ride, in addition to less-congested airspace. Those long, low, flat, power-on final approaches can put you in the trees if your engine even coughs on short final. Keep a little energy in the bank and make it SOP to shoot for a reasonable aiming point on the runway.

I ts widely accepted that having good situational awareness is vital to safe and efficient flying. But what does situational awareness even mean? How do we develop and maintain the good kind? How do we fit ourselves into the big picture, and why is it important to do so? And once we understand these aspects of situational awareness, how can we use it to make things easier? On three recent flights, I feel I had a high level of situational awareness and used it to make a difference. In one I used my knowledge of my place in the big picture to help another pilot. In the second I used it to help myself. In the third I used it to eliminate a possible delay on an approach. Heres what Im talking about.

The primary cause of a bounced landing is flaring too high above the runway, perhaps with too much speed. In our ideal, perfect landing, the airplane will quit flying just inches above the runway. Instead, a bounce results when the flare occurs a few feet above it, and the airplane has the energy-resulting from excess altitude, excess airspeed or both-to rebound back into the air. In any event, a bounce results when the airplane isnt finished flying.

The April 4, 2018, crash of a Piper PA-28R-201 Arrow V operated by Embry-Riddle Aeronautical University (ERAU) continues to have repercussions. Most recently, the FAA has published a proposed airworthiness directive (AD) that would require inspecting each main wing spar of a wide range of Piper airplanes. The proposed AD is a response to the ERAU crash, which involved the inflight separation of the Piper Arrows left wing. Both aboard died and the airplane was destroyed.

At FL400, the autopilot started porpoising and was turned off. Afterward, the aircraft would not trim properly. The crew diverted; it was difficult to keep it pitched down while descending. During the final phase of flight, the yoke was very difficult to input pitch changes, but was okay in the roll axis. After landing, troubleshooting duplicated the problem. Elevator servo (p/n 4006719914) was replaced with serviceable unit.

After flying south through the Cajon Pass at 6500 feet msl, the airplane turned west and encountered what the commercial pilot presumed was leeside turbulence from the mountain range. She turned back south to find smoother air but the turbulence became more severe and the airplane began to descend rapidly. As the airline transport pilot struggled to change frequencies in the turbulence, the airplane descended to 2000 feet msl (about 500 feet agl). The commercial pilot applied full power but the engine did not respond. After the airline transport pilot enrichened the mixture and applied carburetor heat, the engine momentarily regained power. At about 2300 feet msl, the engine again lost power, and the ATP decided to land on the westbound lanes of a freeway. As he attempted to avoid a vehicle, the airplane landed hard.

As the morning waned, the weather picture improved greatly, with only scattered showers and clouds over the Mojave Desert and clearing over the west side of the Tehachapi Mountains. We ended up filing to go over Victorville and into Bakersfield to visit family. Soon, we were cruising in VMC at 10,000 feet and looking at the activity over the Mojave. Ahead, there were Pireps for icing above 8000 feet, so we asked for and received routing over Edwards AFB at 6000. Based on what we saw visually and on the FAAs flight information system (FIS-B), we thought we were well out of danger.

Years ago, when I first heard the term runaway trim, my initial thought was something along the lines of, How can that happen? All of the trim systems Id seen up to that time had been manual, unassisted crank, lever or thumbwheel affairs, which rely on the pilot grabbing something and moving it to achieve the desired change. I was aware that trim systems could mechanically fail, but generally would stay in a fixed position when they did. I had discussed and trained for abnormal trim conditions, but how could a trim system run away? Then I learned about electric trim, autopilots and runaway trim, and it all became clearer.

When I was a student pilot, I was lucky to have some grizzled mentors. There were a lot of do this and dont do that admonitions, a lot of tips regarding shortcuts and rules of thumb, plus some sage advice about decision-making. A lot of that advice could be broken down into the old Its better to be on the ground wishing you in the air than to be in the air wishing you were on the ground genre, but it was often accompanied by a Let me tell you what I learned the hard way kind of introduction.