What is this "dial/knob" on BA 747's adjacent to the lights?
#4
Original Poster
Join Date: Aug 2000
Location: SJC/SFO/OAK
Programs: DL PM, SW, Hilton, , UAL PM, AA Gold-skeptic
Posts: 1,632
Thank you for the information, I NEVER would have guessed that. That said, I've been on virtually every aircraft type, including many 747's (but never BA)....and have never seen this device. Is it unique to BA? If so, why is it not on other aircraft? (or if it is, maybe placed in another location?) Still, only on BA in my experience....odd.
#8
Join Date: Jun 2010
Location: KOI
Programs: BA
Posts: 309
Thank you for the information, I NEVER would have guessed that. That said, I've been on virtually every aircraft type, including many 747's (but never BA)....and have never seen this device. Is it unique to BA? If so, why is it not on other aircraft? (or if it is, maybe placed in another location?) Still, only on BA in my experience....odd.
#10
Join Date: Jun 2003
Location: LHR
Programs: BA Exec Club - Lowly Blue
Posts: 162
Aircraft, such as the DC-10 which BA used to operate, had an emergency passenger oxygen supplied by a chemical-generators, which, once activated, could not be turned off, and would run until depletion. On those aircraft types cabin crew would supply therapeutic oxygen to an ailing passenger using small portable oxygen bottles.
To supply therapeutic oxygen, via a plug -in mask, to an individual passenger who needs it, requires the aircraft to have a ring-main passenger oxygen system, supplied and pressurised by oxygen bottles in the holds, with the associated ability to turn the oxygen supply off once therapeutic oxygen is no longer needed. In both cases, as mentioned by sammyh25 different flow rates can be selected by a switch on the mask.
As an aside, the procedure for turning on, and particularly off, the therapeutic oxygen on earlier series of B747, if not followed exactly, or if the passenger disconnected the mask themself, would result in all the passenger emergency oxygen masks dropping down, something I suspect some of the
#11
Join Date: Aug 2009
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