Hi Chesty
If you're picking up on my comment about a specific twin then I should have been more clear. Under our Ops manual for the aircraft in question you cannot dispatch for ETOPS on one pack, but once you have dispatched if a pack then subsequently fails you can continue into ETOPS on the remaining pack, having gone through the appropriate checklist . Hope that's more clear.....
Seeing as this is a passenger forum, for any non-crew trying to follow this, especially the semantics: "Dispatch" occurs ( for us) when the aircraft powers away from the gate. So what the rule is saying is if you have a a/c pack problem prior to that point you must either re-plan the flight (e.g re-route) ,or get the pack fixed. Once you've got moving you're more committed to the original plan (especially from a fuel POV) so the safest course of action from that point on is to continue with plan A. There are similar rules for lots of similar minor unservicabilities...
Here Endeth the lesson..🤓
Last edited by wiggy; 30th Sep 2016 at 14:46.