ASFKAP
Yes that's correct and it has lead to a fatal in the case of Helios and a few
very near misses at a host of other airlines.
To quote an earlier post of mine:
What BOAC refers to, I think is this:
http://www.pprune.org/tech-log/35223...er-system.html
Also another interesting picture!:
Photos: Boeing 737-844 Aircraft Pictures | !!!!!!!!!!!!!!
The former a rare failure mode which despite all the training and contrary to the amended takeoff briefing issued by Boeing as an AD IS actually a config warning once airborne. However the training at the place I work is very clear: Horn when airborne masks on regardless.