GOL 737-8, Руководство по эксплуатации

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737 MAX Flight Crew Operations Manual
Flight Controls -
System Description
9.20.18 MN-FLT-OH-201
Speed Brakes
The speed brakes consist of flight spoilers and ground spoilers. Hydraulic system
A powers all four ground spoilers, two on the upper surface of each wing. The
SPEED BRAKE lever controls the spoilers. When the SPEED BRAKE lever is
raised all the spoilers extend when the airplane is on the ground and only the flight
spoilers extend when the airplane is in the air.
The spoiler control system consists of: the Spoiler Control Electronics (SCE) unit;
position sensors attached to the control wheel and SPD BRK lever; eight
hydraulically powered, electrically controlled flight spoiler actuators and the
Ground Spoiler Control Module (GSCM), which controls six ground spoiler
actuators.
The SPEEDBRAKES EXTENDED light provides an indication of spoiler
operation in-flight and on the ground. In-flight, the light illuminates to warn the
crew that the speed brakes are extended while in the landing configuration or
below 800 feet AGL. It also illuminates if the speedbrakes are extended and the
thrust levers are greater than idle for 15 seconds, or a thrust lever is greater than
approximately 40 degrees for 3 seconds. On the ground, the light illuminates when
hydraulic pressure is sensed in the ground spoiler shutoff valve with the speed
brake lever in the DOWN position.
In-Flight Operation
Operating the SPD BRK lever in flight causes all flight spoilers to rise
symmetrically to act as speed brakes.
Speedbrake commands are electronically limited at the FLIGHT DETENT. In the
event electrical power to the SCE is lost, all spoilers are inoperative and will
retract if extended.
Maneuver Load Alleviation
The Maneuver Load Alleviation (MLA) system reduces wing and aft fuselage
bending loads during certain maneuvers and normal load factors. The MLA
system retracts extended speedbrakes during maneuvers that result in higher load
factors at certain gross weights. The SPD BRK lever does not move during MLA
activation. When the conditions for MLA are no longer present, the speedbrakes
will return to the selected position.
March 1, 2021