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sections of the horizontal stabilizer. Each elevator has a tab and
three balance panels. The forward side of the elevator connects
to the three balance panels. The balance weights attach to the
lower surface of the balance panel. The tab attaches to the aft
edge of each elevator.
Functional Description
When the output torque tube moves, it moves the elevator
control rods. This moves the elevators and the elevator tab
rods. The elevator tab rods normally move the elevator tab in a
direction opposite to the elevator movement.
Elevator travel is limited by the stroke of the elevator power
control units. The stabilizer neutral position is four units of trim.
When the stabilizer is neutral (and no FCC input to the mach
trim actuator), the elevator is downrigged four degrees from the
stabilizer cord line. From this position, the elevator can move
24.3 degrees up and 18.1 degrees down.
ELEVATOR AND TAB CONTROL SYSTEM - ELEVATORS
EFFECTIVITY
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ELEVATOR AND TAB CONTROL SYSTEM - ELEVATORS
ELEVATOR AND TAB CONTROL SYSTEM - ELEVATORS
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Purpose
The elevator balance panel and tab mechanism decreases the
force necessary to move the elevator in flight.
Location
The elevator balance panels are between the trailing edge rib 1
and 14 of the horizontal stabilizer.
Physical Description
The forward edge of the elevator balance panel attaches to the
horizontal stabilizer rear spar through an idler hinge. The aft
edge attaches to the elevator.
Seals connect the hinge assemblies along the two sides of the
balance panel. This makes two separate chambers. The upper
chamber vents to the airstream over the horizontal stabilizer
and the lower chamber to the airstream under the horizontal
stabilizer.
Functional Description
When there is no elevator control input, the pressure forces
across the elevator balance panel keep the elevator in the
neutral position. When the elevator moves, the pressure forces
cause the balance panels to move in the opposite direction of
the elevator movement. This effect is necessary during manual
reversion control.
ELEVATOR AND TAB CONTROL SYSTEM - ELEVATOR BALANCE PANEL
EFFECTIVITY
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737-600/700/800/900 AIRCRAFT MAINTENANCE MANUAL
27-31-00-009
ELEVATOR AND TAB CONTROL SYSTEM - ELEVATOR BALANCE PANEL
ELEVATOR AND TAB CONTROL SYSTEM - ELEVATOR BALANCE PANEL
EFFECTIVITY
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737-600/700/800/900 AIRCRAFT MAINTENANCE MANUAL
27-31-00-009
Purpose
The elevator feel computer changes the control column forces
as the airspeed changes and the horizontal stabilizer moves.
Location
The elevator feel computer is on the aft right wall of the
stabilizer compartment.
Physical Description
The elevator feel computer is a dual unit. The housing has
identical components for system A and for system B.
Functional Description
The elevator feel computer receives inputs from these items:
* Pitot tubes through the pitot ports
* Hydraulic system A and B
GUN 001-099, 101-113, 115, 201-999
* Elevator feel shift module
GUN ALL
* Horizontal stabilizer through the input rod.
The elevator feel computer uses these inputs to control the
hydraulic pressure to the dual feel actuator on the elevator feel
and centering unit.
ELEVATOR AND TAB CONTROL SYSTEM - ELEVATOR FEEL COMPUTER
EFFECTIVITY
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737-600/700/800/900 AIRCRAFT MAINTENANCE MANUAL
27-31-00-010
ELEVATOR AND TAB CONTROL SYSTEM - ELEVATOR FEEL COMPUTER
ELEVATOR AND TAB CONTROL SYSTEM - ELEVATOR FEEL COMPUTER
EFFECTIVITY
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737-600/700/800/900 AIRCRAFT MAINTENANCE MANUAL
27-31-00-010
　
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