Flaps are a pretty standard device on airplanes, and one that many pilots take for granted. Whether we have manual flaps actuated by a lever on the floor, or fancy electric driven flaps that move at the touch of a switch, flaps can and do fail in flight.
I happened to remember the other day while I was driving this experience from my life as a pilot. I was on my way back from an American Bonanza Society (ABS) Service Clinic, where experts on the Beech aircraft line went over my plane with a fine-tooth comb, looking for problems. They poked and prodded, did a retraction test of the landing gear, and found a few problems that needed to be resolved.
We had even more questions on fueling as a result of the article on explosive potentials in fueling your airplane from a fuel truck. One reader pointed out that he has a professional contractor's tank in the bed of his pickup, and that he uses that tank to fuel his airplane. He wondered if using this rig could expose his plane to a potential static electrical charge, and in doing so, introduce the potential for an explosion while he was fueling his airplane.
Excluding certain personalities, AvGas is the most explosive part of your piston-powered airplane. For the energy that AvGas contains, it actually can pose a significant threat to the safety of flight.
Maybe one of the best "flying lessons" I ever got took place 60 feet below ground level! Back in the Bad Old Days of the Cold War I served as an Air Force Minuteman launch control officer. How I came to do that for a living, when I took command of the Air Force's Precision Sitting Team, the "Thunderchairs," and why I actually launched an ICBM in 1987 are all stories for some other forum. But the pressure-cooker environment of potential total nuclear war, 60 feet under the Missouri plains, strangely did much to prepare me for the single-pilot cockpit of a piston airplane. One thing the "missile business" did for me was to teach the concept of minor, major, and critical errors.