Spoilers will deploy in the following modes.
Ground spoilers automatically extend when armed:
- both thrust levers at forward idle and both MLG touch down (Flight /
Ground transition),
-during Take Off (TO) run at speed greater than 72 knots (kts) and
both thrust levers retarded at forward idle.
Ground spoilers automatically extended (not armed):
- when both MLG touch down and reverse is selected on at least one
engine (remaining engine at idle),
- or during TO run speed greater than 72 kts and reverse is selected on
at least one engine (remaining engine at idle).
Ground spoilers partially extend:
- when reverse is selected on at least one engine (remaining engine at
idle) and one MLG is compressed.
This partial extension (10degrees) by decreasing the lift, will ease
compression of the second MLG, and consequently will lead to the normal
ground spoiler extension.
Thrust Reversers
SECs and EEC must have TLA below -3degrees for thrust reverser deployment and RA <6ft, this data is from the potentiometers of the throttle control unit and Rad alts respectively.
Regards
Beeline