MD-11 Flight Crew Operations Manual
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Hydraulics -
Components
Hyd.20.2
Flight Control Bypass Valve
1. Flight Control Bypass Valve
Amber alert HYD SYS 3 ISOL is displayed on the EAD when:
• Flight control bypass valve is not in the normal open position.
• Maintenance closes the valve via the Multifunction Control Display Unit
(MCDU) for maintenance reasons.
• Circuit breaker is open.
NOTE: The airplane cannot be dispatched. Maintenance action is
required. This valve can only be closed on the ground.
LB1-3-0270
SYSTEM 3
SPOILERS
AILERONS
ELEVATORS
STAB. TRIM
SLATS
BRAKES
STEERING
LANDING GEAR
FREE FALL
1
October 02, 2006
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