I have noticed on my recent flights that as soon as the engines are started there seems to be a ding in the cabin. Is this simply the system being switched over from aux. power (I would guess this), or is it a confirmation to the flight attendants from the flight deck?
Thanks for the replies.
Scaredflyer21
Moderators: jsumali2, richierich, ua900, PanAm_DC10, hOMSaR
RE: Ding After Engine Start
If it sounds similar to an F/A call button it's the pilots signaling that they want an F/A to pick up the intercom.
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- JetSetter001
- Posts: 31
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RE: Ding After Engine Start
I would rather guess that it is sme sort if signal as the power supply changes from apu to engine power. Normally the "ding" is to hear after a short flicker of the lights (very short "loss" of power) which is due to the engines now being responsible for the oboard power.
RE: Ding After Engine Start
Depends on the aircraft and the airline. Some aircraft may make that sound when the power is switched over. Or it can be an airline procedure.
For example at Qantas the Pilots will 'double ding' the cabin crew at no 1 engine start as a signal to start the safety demonstration.
For example at Qantas the Pilots will 'double ding' the cabin crew at no 1 engine start as a signal to start the safety demonstration.
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- Amazonphil
- Posts: 544
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RE: Ding After Engine Start
As stated above, this is the switch from APU power through the transfer bus to engine generator power. Some a/c make a "ding or dong" and lights momentary flicker while other a/c just have the lights flicker for a sec.
Rgs,
Rgs,
If it ain't Boeing, I ain't goeing!
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