Obviously aircraft have a certain amount of hours left remaining on say an engine or prop before an overhaul, but is there a set minimum before these are replaced or does it change for aircraft type and engine type etc?
Also, is there a maximum no. of hours an airframe can have before its deemed unusuable?
Sorry if these questions are really obvious, but I'm not really up to speed on maintenance procedures, especially when it comes to these types of things.
Thanks in advance