22-13-00
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A
747-400 MAINTENANCE MANUAL
LATERAL AUTOPILOT SERVO - REMOVAL/INSTALLATION
______________________________________________
1. General_______
A. This procedure contains two tasks. The first is the removal of the Lateral Autopilot Servo (LAS) from the forward bulkhead of the left wing gear well. The second is for the installation of the LAS. The installation task includes the necessary test steps to make sure the LAS operates correctly.
B. Three mounting bolts attach the LAS (B7085) to the structure. The crank arm of the LAS attaches to a control arm. There are two hydraulic lines and one electrical plug that are also attached to the LAS.
TASK 22-13-01-004-023
2. Lateral Autopilot Servo Removal (Fig. 401 and 402)_______________________________
A. Special Tools and Equipment
(1)
G12001-XX rigging pin #2 (A/S-2). The pin should be 0.309 to 0.311 inch diameter (0.303 to 0.308 is optional), with a minimum length of
5.5 inches.
(2)
G12001-XX rigging pin #3 (A/S-3). The pin should be 0.309 to 0.311 inch diameter (0.303 to 0.308 is optional), with a minimum length of
2.0 inches.
(3)
MIT65B04001-41, Control Wheel Straight Edge Miscellaneous Tool
B. Standard Tools and Equipment
(1) Bucket
C. References
(1)
24-22-00/201, Manual Control
(2)
29-11-00/201, Main Hydraulic Supply System
(3)
32-00-30/201, Landing Gear Door Locks
(4)
IPC 22-13-01, Fig. 1
(5)
IPC 27-11-08, Fig. 1
D. Access
(1) Location Zone
135 Wing Landing Gear Well, LH
E. Prepare for the Removal
S 864-024
(1) Supply the electrical power (Ref 24-22-00/201).
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747-400 MAINTENANCE MANUAL
SEE B
SEE A
B
RIGGING PIN A/S-2
RIGGING PIN A/S-3
A
Lateral Autopilot Servo Installation and Safety Tools
Figure 401
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ALL ú ú 01 Page 402 ú Oct 10/90
BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
A 747-400 MAINTENANCE MANUAL
3. BOLT 4. WASHER
5.NUT
2. 1. BOLT BUSHING
CONTROL ROD
3. BOLT 6. SERVO AUTOPILOT LATERAL
4. 5. NUT WASHER
Figure 402 LAS Mounting Details
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747-400
MAINTENANCE MANUAL
S 494-056
WARNING: YOU MUST CAREFULLY DO THE STEPS IN THE TASK BELOW TO INSTALL
_______ THE DOOR LOCKS ON THE LANDING GEAR DOORS. THE DOORS CAN CLOSE QUICKLY IF YOU DO NOT INSTALL THE DOOR LOCKS CORRECTLY. THIS CAN CAUSE INJURY TO PERSONS OR DAMAGE TO EQUIPMENT.
(2) Do this task: "Body Landing Gear Door Lock Installation" (Ref 32-00-30/201).
S 864-057
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) Remove the hydraulic pressure from hydraulic systems 1, 2, 3, and 4 (Ref 29-11-00/201)
NOTE: Make sure the hydraulic pressure is down to zero before you
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