Originally Posted by
Litebulbs
Bis47,
If you are called to an aircraft that has returned to stand, you go to the MEL. If you cannot find a relevant section in the MEL for the defective item that you have, it means that it is either an non airworthiness item or it is a no dispatch.
It appears that the fault was diagnosed as a heater problem ...
That diagnosis is what may be questionable. The heater is pretty simple, and appears to have been working (and obviously so - that was the reported problem). Therefore what was the "heater problem" ? And if the heater wasn't the "defective item"... then what was MELed ?
I wonder, did they test the heater, and did it pass ?
Should it be a reasonable expectation for engineer to realise that if a heating element heats up when it isn't supposed to, then the heater is not broken (which is what the MEL deals with),
something else is broken ?
We don't need to get as far as whether we can expect the engineer (at the stand) to realise this is a air-ground sensing fault (although some might, if they've seen it before), just to get as far as realising that
something other than the heater is broken.