not sure where this thread is going but can give you a common failure...
normal or alternate brake failure(normally due to hyd leak)
blue pump overheat.. no bl system
hehe the best one is if captain or FO tray table is broken... that p**ses crew off no end and its only a MEL CAT D
as for engine fire... your FADEC will help there... its the fire after firing the bottles i would worry about.
as for the last post .. had to TS an engine stall tonight... the engine did not shut down but gave me a PFR indicating the problem... turns out not enough bleed from APU caused HPTC vlv not actuating as instructed.
if you can get access to airbusworld there is lots of engineering info about reoccuring problems that are/were present on a320