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Old 20th Jul 2011, 23:40
  #557 (permalink)  
A33Zab
 
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@Bear:

Asym config. At first blush, a jammed or unstowed spoiler. Consistent with a RL input at handoff. Or an hung aileron. Rudder issue?
All A330 Flight Controls servos are individually monitored, including spoiler servo jacks.
If one 'refuse' to act as commanded the FCPC/FCSC will take corrective
actions to prevent such an asymmetry; e.g. remove symmetric hydr.
pressure to aerodynamically stow the spoilers and at the same time
locking the extend movement (excl. 4 & 6 for roll support) to prevent
floating spoilers.

This will be notified to crew by an appropriate ECAM message:
"F/CTL SPLR FAULT"
or in case of aileron fault:
"F/CTL L (R) OUTR (INR) AIL FAULT"

Both faults were NOT present at the time.

I did mention it before, could MLA be any factor?

Manoevres Load Allevation.

The purpose of MLA is to distribute the lift over the wing to relieve
structural load on the outer wing surfaces (bending moment).
The demanded load factor is maintained.
MLA utilises spoilers 4,5 & 6 and the ailerons.
The MLA becomes active when the side stick is pulled more than ,
and the load factor is more than 2g, in which case:
- The ailerons are deflected symmetrically upwards:
Max 11° added to Roll demand, if any.
-Spoiler 4,5 & 6 are symmetrically deflected:
Max 9° added to Roll demand, if any.
- Deflection is proportional to load factor in excess of 2g.

An elevator demand is simultaneously applied to compensate for the
pitching moment induced by spoilers and ailerons.

The load allevation is only available:
CAS > 250 Kts
FLAP LVR = 0 position
In NORMAL or ALTERNATE LAW.

MLA has priority over the speedbrakes.

Last edited by A33Zab; 21st Jul 2011 at 00:19.
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