I was working on a fire in Montana when the topic of switch labeling came up in casual conversation since we had just been through a USFS audit. We were joking about labeling the left cyclic stick “FWD rotor” and the right cyclic stick “AFT rotor” after the comic we drew in which Sally doesn’t quite understand how a Chinook flies.
My avionics tech Trevor said, he always loved to have a random unlabeled switch in the cockpit that didn’t really do anything other than count how many times it is flipped just to see how many times pilots would flick it to find out what it does. I thought the idea was great and had “Chuck and Julio” written all over it! So, here we are.
I also remember a story that was quite the opposite. I once was flying a Twin Star offshore that was originally built in France. It still had one switch labeled in French (it was a French acronym or something) and nobody knew what the switch did. I asked the pilot who was checking me out on the aircraft and the offshore routes and he just said “I don’t know. Don’t touch it!” I never did. And nobody else ever did either. The switch was very close to the arm-switch for the pop-out emergency floats. Turns out nobody was brave enough to mess around with a mysterious switch while being miles and miles offshore. We flew this thing for 3 years and nobody ever touched the switch. 😉