MMEL A321!Help me explain plz
Thread Starter
Joined: Aug 2017
Posts: 5
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From: Hanoi
MMEL A321!Help me explain plz
29 HYDRAULIC POWER
30-03 ECAM HYD Page
Indications (Continued)
5) System Label C 3 0 (O) May be inoperative provided:
a) Associated system pressure is
verified before each departure,
and
b) Associated spoilers availability is
verified before each departure
Why we have to verify spoiler avail? (operate spoiler to confirm system pressure avail) , instead of other flight control surface.
Regards,
30-03 ECAM HYD Page
Indications (Continued)
5) System Label C 3 0 (O) May be inoperative provided:
a) Associated system pressure is
verified before each departure,
and
b) Associated spoilers availability is
verified before each departure
Why we have to verify spoiler avail? (operate spoiler to confirm system pressure avail) , instead of other flight control surface.
Regards,
Joined: Jan 2014
Posts: 720
Likes: 1
From: N5109.2W10.5
Hi lahoanghai,
See QRH, Operational Data, Flight Controls Architecture.
The individual spoilers are powered by a single HYD system, so if a HYD SYS pressure fails, the spoiler won't move.
The other flight control surfaces have at least 2 HYD Sytems powering them, so if only One HYD SYS fails, the surface will still move.
Why we have to verify spoiler avail? (operate spoiler to confirm system pressure avail) , instead of other flight control surface.
The individual spoilers are powered by a single HYD system, so if a HYD SYS pressure fails, the spoiler won't move.
The other flight control surfaces have at least 2 HYD Sytems powering them, so if only One HYD SYS fails, the surface will still move.
