Parts removed for troublesgooting reason
I would like to ask how are you dealing with the parts which are removed from aircraft for troubleshooting.
Let's imagine that aircraft engineer removed the part and installed new one i.a.w. T/S procedure suspected to be the cause of the problem, after that the fault still present.
Aircraft was dispatched i.a.w. MEL after few legs, next steps of T/S was performed. The fault was cleared after different component replacement.
My question is what are the conditions under which the part removed at the beginning of T/s can be consider as serviceble without workshop approval?
What about EASA Form 1?
Thank you for any ideas.