Parking Brake Release
Join Date: Feb 2008
Location: Brazil
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Quote:
The EICAS message disappears, yes, but the bang is nice to confirm with all in the flight deck, not just the FO, that the brakes release has been performed, whilst no visual identification is required.
Hey, do you really need to hear a bang in order to confirm the brake release ???? You all must be kidding me.
The EICAS message disappears, yes, but the bang is nice to confirm with all in the flight deck, not just the FO, that the brakes release has been performed, whilst no visual identification is required.
Hey, do you really need to hear a bang in order to confirm the brake release ???? You all must be kidding me.
Join Date: Sep 2006
Location: Mumbai India
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something similar and not so same
on a similar line.. in regards to make a noise... a trainer once told me tht when u land u should slam the thrust lever to idle(A 320) since the noise helps in reconfirming tht the thrust is idle jus in case... :P
utter nonsense.... and about the brake release... well most DFDR def have parking brake status as an important parameter.... hence the whole question of makin a racket with the lever shouldn't really arise...and ofcourse... 'parking brake released' is a very pragmatic call...
utter nonsense.... and about the brake release... well most DFDR def have parking brake status as an important parameter.... hence the whole question of makin a racket with the lever shouldn't really arise...and ofcourse... 'parking brake released' is a very pragmatic call...
Join Date: Apr 2008
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A few years back we had a peculiar incident with regard to the Parking Brake. The P1 released the brakes and then cushioned the lever to avoid the noise. The Parking Brake light went out but during TO the config warning came on. On investigation it turned out that though the lever had left the full position, it never returned to the neutral posn and somehow managed to keep the brake lines pressurised.
After that the "unofficial" rule was to let the lever release with the bang - atleast we will know that it has released.
PS: I'm talking about a B738.
After that the "unofficial" rule was to let the lever release with the bang - atleast we will know that it has released.
PS: I'm talking about a B738.
Join Date: Nov 2000
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What sort of a/c are you guys operating, on the NG and 76, 777 the parking brake is practically silent on release.. I would have to hit it with the axe to get any noise
for info the CVR is on all the time electrical power is established in flight and only after engine start on the ground.. and given the flurry of visitors to the flight deck before start it makes sense.
for info the CVR is on all the time electrical power is established in flight and only after engine start on the ground.. and given the flurry of visitors to the flight deck before start it makes sense.
Bottums Up
From the Douglas/Boeing 717 FCOM.
The CVR operates automatically and continuously whenever power is available to the airplane. No crew action is required.
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From the B737NG systems manual quote:
Normal ( guarded position)-
. In flight- the recorder operates anytime electrical power is available
. On the ground- either engine must also be operating
TEST- Powers the flight recorder on the ground
Normal ( guarded position)-
. In flight- the recorder operates anytime electrical power is available
. On the ground- either engine must also be operating
TEST- Powers the flight recorder on the ground
Join Date: Apr 2008
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@avenger
In our fleet we have 2 methods of CVR activation.
In the leased acfts, you need BOTH AC power and either engine N2 > 50%. So our SOP directs us to manually start the CVR in the Preflight Procedures by moving the Voice Recorder switch to ON. It automatically goes to the AUTO position when either engine accelerates to 50% N2.
But in our own acfts, the CVR runs continuously whenever the AC Busses are powered. So in those acfts, we have to pull the CVR CB at the end of the flight day to prevent the erasure of the recordings and to permit CVR downloads for FOQA purposes
PS: Oops. Didn't notice you were talking about the FDR. My bad
In our fleet we have 2 methods of CVR activation.
In the leased acfts, you need BOTH AC power and either engine N2 > 50%. So our SOP directs us to manually start the CVR in the Preflight Procedures by moving the Voice Recorder switch to ON. It automatically goes to the AUTO position when either engine accelerates to 50% N2.
But in our own acfts, the CVR runs continuously whenever the AC Busses are powered. So in those acfts, we have to pull the CVR CB at the end of the flight day to prevent the erasure of the recordings and to permit CVR downloads for FOQA purposes
PS: Oops. Didn't notice you were talking about the FDR. My bad
