@megan
I'm just happy if students remember to discharge the fire bottle as part of the engine fire drill. Double DECU fail and all those other obscure or infinitely unlikely possible malfunctions are a bridge way too far. Sticking to proficiency in the basic stuff usually takes up all of the available training time; hopefully should the dog of fate appear it's just a gentle bite.
I'm drifting way OT here, sorry about that. I'll shut up now.