Originally Posted by slowjet
BOAC, all bleeds off wouldn't half be felt in most ears.
- yes, but we have at least one poster 'claiming' all bleed switches were in the off position in the wreckage (don't know the 'provenance' for this statement) and another that Helios commonly used bleeds off or APU for this trip as a tanker.
This is why some links to some sort of 'official' investigation/s would be really useful.