Gee, I wonder what this button does? (#Blogathon)

If you’re not sure what a button does sometimes you’re better off just leaving it a mystery:

The Boeing 767-300 was undergoing a heavy maintenance check at the company’s Alliance Airport hangar, when the nose gear suddenly folded up, as it would if the plane was in the air.

[...] At the time, mechanics were running the aircraft through a series of functional tests, according to Tim Wagner, a spokesman for the airline.

Amazingly, no workers were injured when the gear collapsed. During ground tests, mechanics often sit in the cockpit or stand near the belly of the plane.

I’m sure it’s a mistake any under-trained airline technician could make.