There’s a saying that familiarity breeds contempt. Unfamiliarity can do the same thing. In aviation, we see the familiarity side of things when we throw caution to the wind (or worse). We ignore checklists. We rush. We do…dumb things. Most of us have been guilty of this. Examples abound: forgetting to turn off the master switch in the FBO’s Cessna, only to get a phone call later; forgetting to untie (or tie) the tiedowns; forgetting to lower the landing gear.
It’s natural to let your guard down when you’re in a comfortable environment. The good news is that you are comfortable in a place where you don’t really belong. The bad news is that you are prone to making mistakes because “it could never happen to me.” That’s probably what you said the last time you locked your keys in your car. In fact, such a dumb, easy mistake has forced the automobile manufacturers to idiot-proof cars as much as possible to try to avoid this, but people still find a way to validate human idiocy.
When you are overly familiar with something, either it’s time to force yourself to re-adapt the good habits, or it’s time to change your habits. Take the car keys. Once you’ve made this mistake, you quickly learn to check that the keys are in your pocket/bag/purse/suitcase/whatever before you close the door. You’re still looking to make sure that they aren’t in the car, but instead of looking to see if they aren’t where you don’t want them, you’re looking to see if they are where you do want them. The goal is the same, but the process is different.
With the master switch, an easy way to fix the problem is to always leave the anti-collision light on. That way, if you walk away from the airplane and see the beacon on, you’ll know that the master switch is on.
Unfamiliarity also can create problems, especially when the change from one piece of equipment to another is fairly drastic. For example, at my old airline there was a famous story—true—of a captain who transferred out of the turboprop and into the jet. Without getting bogged down in details, he was forced to leave an engine running after pulling into the gate. That by itself is no big deal; it happens all the time. Generally speaking, within a few minutes, he would be able to shut it down. Well, a few steps in the chain weren’t completed, and he was new to the airplane, so he was out of his comfort zone. Further, in the turboprop, a running engine could be easily seen (the spinning propeller) and heard (it was right next to the cockpit window). With a tail-mounted jet, you don’t see anything, and you don’t hear much more than anything.
He found out that he had left the engine running when he got a call from the station after he had arrived at the hotel. He had to talk the ground folks through the shutdown over the phone. In the end, nobody was hurt, but the lesson was learned: Try to know what you don’t know.
Familiarity and unfamiliarity can both be dangerous, but for different reasons. If you find your normal routine is not working, change it to one that does.—Chip Wright