Lu:
Thanks Lu; with regard to the difference between 'piece part' and 'component', how does one regard complicated components such as main rotor gearboxes (and even engines).
Is it possible to do 'piece part' analyses of main gearboxes and if so is damage tolerence considered? Is degradation due to wear considered and is this reflected in TBOs?
If the whole main gearbox (in effect a train of parts) has to meet the 1309 requirement of 10 -9, isn't it difficult considering the number of elements in the single failure path (have I expressed that well enough?).
What is more effective (practical), piece part analysis or component monitoring with HUMS?
It must be nice to be a clever bloke!