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A
747-400 MAINTENANCE MANUAL
S 644-030
(9)
Do this task: "Stabilizer Trim Jackscrew, Upper and Lower Gimbal Lubrication" (AMM 12-21-19/301).
S 614-032
(10)
If it is necessary, do this task: "Primary Brake Housing Lubrication" (AMM 12-21-19/301).
S 714-034
(11)
Do this task: "Operational Test - Stabilizer Trim Drive Mechanism" (AMM 27-41-06/501).
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747-400 MAINTENANCE MANUAL
STABILIZER TRIM DRIVE MECHANISM - ADJUSTMENT/TEST
_________________________________________________
1. General_______
A. This procedure has one task. The task is an operational test of the stabilizer trim drive mechanism (which is referred to as the "mechanism").
TASK 27-41-06-715-001
2. Operational Test - Stabilizer Trim Drive Mechanism__________________________________________________
A. References
(1)
06-09-05/201, Body Section 48 Access Doors and Panels
(2)
24-22-00/201, Manual Control
(3)
29-11-00/201, Main Hydraulic Supply System
B.
Access
(1)
Location Zone
311 Area Aft of Pressure Bulkhead, LH
312 Area Aft of Pressure Bulkhead, RH
(2)
Access Panel 312A Horizontal Stabilizer Jackscrew Access Door
C.
Procedure
S 865-002
(1)
Make sure that a person in the 48 section can hear you from the control cabin.
S 865-003
(2)
Do this task: "Supply Electrical Power" (Ref 24-22-00/201).
S 865-004
WARNING: MAKE SURE THAT PERSONS AND EQUIPMENT ARE CLEAR OF ALL CONTROL
_______ SURFACES BEFORE YOU SUPPLY HYDRAULIC POWER. AILERONS, RUDDERS, ELEVATORS, FLAPS, SPOILERS, LANDING GEAR, AND THRUST REVERSERS CAN MOVE QUICKLY WHEN YOU SUPPLY HYDRAULIC POWER. THIS CAN CAUSE INJURY TO PERSONS AND DAMAGE TO EQUIPMENT.
(3)
Do this task to pressurize the hydraulic systems No. 2 and No. 3: "Supply Hydraulic Power" (Ref 29-11-00/201).
(4)
Open the access door 312A (Ref 06-09-05/201).
S 015-005
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747-400
MAINTENANCE MANUAL
SWITCHES STABILIZER TRIM ALTERNATE ELECTRIC
POSITION INDICATORS STABILIZER TRIM
SEE A
SWITCHES SHUTOFF VALVE STABILIZER TRIM
UPPER GIMBAL
BRAKES HYDRAULIC SWITCHES TRIM LIMIT STABILIZER
MOTORS HYDRAULIC GEARBOX STABILIZER TRIM
MODULES TRIM CONTROL STABILIZER
A
Figure 501 Stabilizer Trim Drive Mechanism
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