Rags and wrenches in the hydraulics of a 206.
206 Tail Rotor installed backasswards. (I kid you not)
Wrenches on the engine deck or various 205s and 212s. They had a way of hiding just at the edge of the deck darn hard to see.
A socket still attached to a bolt in the engine compartment compete with the guilty party’s name etched thereupon.
I myself am not without sin. For example ( and there are afew) refuelled an Astar once, Flew 2 hours with about 10 landings..returned to refuel…gas cap sitting. snugly in the step next to the fuel tank.
In Burma you always checked the 76 very carefully for snakes. I never found one but others did. On two occasions in flight.
A friend had a fixed wing student do a DI one early morning.
He returned to announce that the aircraft was ready.
Walking towards the aircraft: “Bloggins, you did a DI, correct?”
“Yes Sir!”
”Bloggins, look carefully, what is missing?”
Bloggins circles the aircraft. “Looks good Sir!”
”Bloggins how do you expect to move forward with no propeller attached to the aircraft?”
That cost Bloggins a case of beer.