Remaining on the MEL issue, I'd like to digress a bit.
Certain MELs have conditions that have to be complied with in order to defer the defect, such as having the ECAM switch working in case of an ADIRU failure (on the A330).
Now according to one maintanence engineer in my outfit, the requirements for defering the defect have to
only be met at the time of the deferment. Once the defect has been defered, the requirements do not need to be met. In this case, if the faulty ADIRU has been defered, and the ECAM switching becomes faulty later on with the deferment still active, the deferment is still valid and the aircraft is considered airworthy
Sounds fishy if you ask me.
Can anyone confirm this?