Originally Posted by
Angle of Attack
Had a cracker a few months ago,
APU OUT
1 PACK OUT
1 REVERSER OUT
AUTOBRAKE U/S
AUTO SPEEDBRAKE OUT
ENGINE ANTI ICE OUT L/H ENGINE
ANTISKID OUT
3 CDL’s
Let’s just say it turned into a ferry flight instead of an RPT service lol.
That’s a good example. I’m normally quite happy with items that just leave you with a bit less redundancy but when you get multiple defects that considerably increase workload and/or reduce performance then it’s time to take a step back. Given the number of possible items you can carry, you don’t need to have many randomly picked from the list before it becomes likely that no-one has operated with that combination before, which should give pause for thought.
The people who author the MEL/DDG are pretty good at it but they can only take into account a certain amount of extant or subsequent failure, probably fairly obvious ones. Stack ‘em up and you’re soon into test pilot territory, like QF32.