SEE B
SEE A
ACCESS
PANEL
315A FWD
AFT QUADRANT TORQUE TUBE
A
2. 3. NUT WASHER 4. SERVO ASSEMBLY 10. BOLT
1. BOLT
1. BOLT
(REF) CONNECTOR ELECTRICAL 7. 11. NUT WASHER
5. BOLT 8. ASSEMBLY CONTROL ROD 9. TORQUE TUBE AFT QUADRANT
LINE (REF) PRESSURE HYDRAULIC (REF) LINE RETURN HYDRAULIC ELEVATOR AUTOPILOT SERVO 7. 6. WASHER NUT (REF) OUTPUT CRANK
B
Figure 401 Elevator Autopilot Servo Installation
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A
747-400
MAINTENANCE MANUAL
SEE A
CONTROL COLUMN TORQUE TUBE
RIGGING PIN E-1
FWD
A
Rig Pin Installation Figure 402 (Sheet 1)
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747-400
MAINTENANCE MANUAL
CENTER EAS (B7082) (B7083) RIGHT EAS LEFT EAS (B7081)
SEE B
FWD
TORQUE TUBE AFT QUADRANT AFT QUADRANT TORQUE TUBE
SEE C
RIG PIN E-2
RIG PIN E-2 B
C
Figure 402 (Sheet 2) Rig Pin Installation
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A 747-400 MAINTENANCE MANUAL
S 864-063
(3) Put the FLT CONTROL HYD POWER TAIL 1, 2, and 3 switches in the SHUTOFF position. You can find these switches on the Pilots' Overhead Maintenance Panel (P461).
S 864-064
(4) Put the STAB TRIM 2 and 3 switches in the CUTOUT position. Attach DO-NOT-OPERATE tags to the STAB TRIM 2 and 3 switches. You can find these switches on the Pilots' Control Stand.
S 864-065
(5) Open these circuit breakers and attach DO-NOT-CLOSE tags: (a) P7 Overhead Circuit Breaker Panel 1) 7D7, FLT CONT CMPTR L SERVO 2) 7D8, FLT CONT CMPTR L PWR 3) 7D12, FLT CONT CMPTR C SERVO 4) 7D13, FLT CONT CMPTR C PWR 5) 7D14, FLT CONT CMPTR R SERVO 6) 7D15, FLT CONT CMPTR R PWR 7) 7E7, STAB TRIM L S/O 8) 7E20, STAB TRIM R S/O (b) P180 DC Power Distribution Panel 1) 180E7, ELEV/RUD VLV SYS 2 2) 180E22, ELEV/RUD VLV SYS 4 3) 180H8, ELEV/RUD VLV SYS 1 4) 180H23, ELEV/RUD VLV SYS 3
S 864-207
(6) Attach DO-NOT-OPERATE tags to the two control columns.
S 014-189
(7) Open the ceiling panel in the area below the control columns to get access to the forward quadrant (AMM 25-59-01/401).
S 834-069
(8) Put rig pin E-1 into the forward quadrant (Fig. 402, Sh. 1).
S 014-070
(9) Open access door 315A to get access to the aft quadrant (AMM 06-09-05/201).
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747-400 MAINTENANCE MANUAL
S 484-198
WARNING:_______DO NOT TOUCH THE PNEUMATIC DUCTS WHEN THEY ARE HOT. WHEN THE DUCTS ARE HOT THEY CAN CAUSE INJURY TO PERSONS.
(10) Put rig pin E-2 at the bottom of the aft quadrant (Fig. 402, Sh. 2).
F. Procedure
S 944-066
(1)
Put a bucket below the hydraulic ports.
S 864-147
(2)
Disconnect the hydraulic lines from the EAS and drain the hydraulic fluid into the bucket.
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