CaptainMongo
Understood, sounds reasonable and proper. Depends on the network you have: some different place, on an awkward day, that SOP toolbox might just be empty.
Opinions might differ. For myself deplaning a cold aeroplane in the daylight is less overall risk than running an ad-hoc untrained, unprepared, live engine ground servicing show without a headset and possibly common language. Remember, the reason behind this scenario is the GHA could not cater for APU-inop airplane in the first place.
It's not a big deal if you seriously need to do it, daytime.
To confirm, my scenario is
APU inop + GPU=NIL -->> ENG=ON -->> BEACON=ON -->> ground servicing not authorized
Without judging or forming an opinion, I find it odd that for the SOP designers as you decribe:
- it is not OK to deplane cold, the preferred option is to wait for GND ELEC whatever it takes
(while at the same time)
- it is OK to unload cargo with ENG1 running, and that waiting a bit is not the more conservative choice.