Too much reliance on QRH?
The NG QRH was probably written by lawyers to cover the product liability problems etc in the US. However, how far do you have to go in following what it decrees?
For example, if you lose the No 1 (left pack ) the QRH calls for the pack to be switched off if it cannot be restored. If you then have a No 2 bleed trip and follow that checklist you find yourself without pressurisation.
Nowhere does it mention the commonsense "open the isolation valve and feed pack 2 from bleed 1 scenario".
OK, so it probably only ever happens in the sim, but, what would you do and why?
Bearing in mind you are now working outside of the protection of the QRH