Oh I see. I was not the one running the tests, but the person running them said the engine was running a minimum of 1.5 hobbs (this was about a month ago so memory fades). If the case be that he did leave the master on for some time, 1.5 on the hobbs should still yield some time on the tach correct?
A plane that I fly for aerial surveying recently had new camera equipment installed, and to test the equipment the engine was running while on the ground. There was testing going on for about 2 weeks. Afterwards, the tach time still lined up with the ending time from the previous flight, but the...