View Full Version : Best Technique for Brake Check on the A321
concordino
13th May 2006, 10:54
This has been a point of different views when it comes to checking brakes at the commencement of the Taxi-out phase of a flight.
On the A321 ( 320 Family) releasing the Parking Brake disconnects the Yellow Hyd Braking system and transfers braking to the Green Hyd system.
Is it better to release brakes let the A/C roll then smoothly apply brakes again.
Or by simply releasing brakes while holding the brake pedals for a brief period insures that the green hyd braking system is functional.
:ugh:
Dream Land
13th May 2006, 17:07
Our SOP accepts both methods, I prefer the "green system enable" method, besides, there are plenty of other opportunities to check brakes while taxiing to the active.
Airbus_a321
13th May 2006, 17:37
Or by simply releasing brakes while holding the brake pedals for a brief period insures that the green hyd braking system is functional.
:ugh:
this is at least the most optimised method and saves an additional brake application.
FlapsOne
14th May 2006, 07:58
Whichever way you choose to do it is fine as long as it doesn't involve slamming on the brakes and grinding to a near-halt with the poor cabin crew thinking we've it a brick wall as some I have witnessed.
Sooner rather than later after starting to taxi, gently press the brakes, see/feel evidence of retardation then release
hetfield
14th May 2006, 09:00
Would a heavy 321 really start moving by releasing parkingbrake and an assumed green brake failure?
Dream Land
14th May 2006, 10:30
What we are looking for is YELLOW system pressure moving to 0 when parking brake is released (whilst holding toe brake pressure).
hetfield
14th May 2006, 10:49
What we are looking for is YELLOW system pressure moving to 0 when parking brake is released (whilst holding toe brake pressure).
errm...
This has been a point of different views when it comes to checking brakes at the commencement of the Taxi-out phase of a flight.
On the A321 ( 320 Family) releasing the Parking Brake disconnects the Yellow Hyd Braking system and transfers braking to the Green Hyd system.
Is it better to release brakes let the A/C roll then smoothly apply brakes again.
Or by simply releasing brakes while holding the brake pedals for a brief period insures that the green hyd braking system is functional.
Dream Land
14th May 2006, 15:29
Our customized FCOM SOP allows both thank you.