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A
747-400
MAINTENANCE MANUAL
SEE A
A
AFT QUADRANT A
2. QUADRANT (CLEVIS/BOLT) A
1. QUADRANT/BEARING 3. QUADRANT/BEARING
4. BEARING/BOLT
A-A
Rudder Aft Quadrant Wear Limits Figure 601 (Sheet 1)
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MAINTENANCE MANUAL
INDEX NO. PART NAME DIM. DESIGN LIMITS WEAR LIMITS WORN PART REPLACE PART WORN REPAIR INSTR. REPAIR
DIAMETER MITTED PER-WEAR DIM. MAX ANCE CLEAR-DIAM
MIN MAX
1 QUADRANT ID 0.8738 0.8743 0.8750 0 1
BEARING OD 0.8745 0.8750 0.8740 X
2 QUADRANT (CLEVIS) ID 0.2500 0.2540 0.2545 0.0060 2
BOLT OD 0.2485 0.2495 0.2480 X
3 QUADRANT ID 0.8748 0.8753 0.8770 0.0020 1
BEARING OD 0.8745 0.8750 0.8730 X
4 BEARING ID 0.3745 0.3750 0.3755 0.0020 X
BOLT OD 0.3735 0.3745 0.3730 X
SHRINK FIT BUSHING
PRESS FIT BUSHING
Rudder Aft Quadrant Wear Limits
Figure 601 (Sheet 2)
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747-400 MAINTENANCE MANUAL
AILERON AND RUDDER TRIM CONTROL MODULE -
______________________________________ MAINTENANCE PRACTICES
_____________________
1. General_______
A. There are three tasks in this procedure. The first task is the removal of the trim control module for the aileron and the rudder. The second task is the installation of trim control module for the aileron and the rudder. The third task is to clean the rudder trim switch.
TASK 27-21-09-002-001
2. Aileron and Rudder Trim Control Module - Removal (Fig. 201)________________________________________________
A. References
(1)
AMM 24-22-00/201, Manual Control
B.
Access
(1)
Location Zones
221/222 Control Cabin
C.
Prepare for the Removal
S 862-002
(1)
Supply electrical power (AMM 24-22-00/201).
S 862-003
(2)
Put the FLT CONTROL HYD POWER - TAIL switches No. 1, 2, 3 and 4 on the overhead panel to the SHUTOFF position and attach DO-NOT-OPERATE tags.
S 862-004
(3)
Open these circuit breakers and attach DO-NOT-CLOSE tags:
(a)
P7, Overhead Circuit Breaker Panel
1) 7D16, RUD TRIM CONT
2) 7D17, AILERON TRIM
D.
Procedure
S 022-005
(1)
Remove the aileron and rudder trim control module:
(a)
Turn the four fasteners that connect the trim module to the aft electronic control panel, P8.
(b)
Lift the trim module from the P8 panel.
(c)
Disconnect the two electrical connectors from the trim module.
(d)
Remove the trim module from the P8 panel.
TASK 27-21-09-402-023
3. Aileron and Rudder Trim Control Module - Installation (Fig. 201)
_____________________________________________________
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