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MAINTENANCE MANUAL
3. BUSHING/BOLT
5. CRANK/BOLT
CONTROL 2. LEVER/BUSHING
ROD
4. BEARING/BOLT
1. LEVER/BOLT AUTOPILOT LATERAL
SERVO
B
LAS Mechanical Linkage Wear Limits Figure 601 (Sheet 2)
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747-400 MAINTENANCE MANUAL
(b)
Compare the dimensions you measured with the permitted dimensions shown in Fig. 601.
(c)
Repair or replace the parts that are out of the tolerance.
S 426-003
(3) Install the parts.
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MAINTENANCE MANUAL
NO. INDEX PART NAME DIM. DESIGN LIMITS WEAR LIMITS PART WORN REPLACE PART WORN REPAIR INSTR REPAIR
DIAMETER PER-MITTED WEAR DIM. ANCE CLEAR-MAX DIA
MIN MAX
1 LEVER ID 0.2495 0.2500 0.2505 0.0030 3
BOLT OD 0.2485 0.2495 0.2475 X
2 LEVER ID 0.4355 0.4366 0.4372 0.0027 3
BUSHING OD 0.4351 0.4361 0.4345 X
3 BUSHING ID 0.2495 0.2510 0.2520 0.0045 X
BOLT OD 0.2485 0.2495 0.2475 X
4 BEARING ID 0.2497 0.2500 0.2503 0.0028 1
BOLT OD 0.2485 0.2495 0.2475 X
5 CRANK ID 0.2495 0.2505 0.2515 0.0040 X 2
BOLT OD 0.2485 0.2495 0.2475 X
REPLACE THE BEARING WHEN THE INTERNAL BEARING CLEARANCE IS LARGER THAN THE MAXIMUM VALUE OF 0.0004.
REFER TO OVERHAUL MANUAL FOR REPAIR INFORMATION.
REFER TO VENDOR MANUAL FOR REPAIR INFORMATION.
LAS Mechanical Linkage Wear Limits
Figure 601 (Sheet 3)
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747-400 MAINTENANCE MANUAL
LATERAL AUTOPILOT SERVO ELECTROHYDRAULIC SERVOVALVE
___________________________________________________ AND SOLENOID VALVE - MAINTENANCE PRACTICES
__________________________________________
1. General_______
A. This procedure contains three tasks. The first is for the removal of the electrohydraulic servovalve (EHSV) or a solenoid valve from the Lateral Autopilot Servo (LAS). The second installs an EHSV or a solenoid valve on the LAS. The third task is a test of the LAS, and uses the Central Maintenance Computer System (CMCS).
B. You can find the LAS on the forward bulkhead of the left-hand wing landing gear well, adjacent to the Central Lateral Control Package -right autopilot (left hand CLCP). There is one EHSV and two solenoid valves, installed on the LAS.
C. The removal/installation procedures are the same for the EHSV and the solenoid valves.
TASK 22-13-02-022-062
2. Lateral Autopilot Servo Electrohydraulic Servovalve and Solenoid Valve______________________________________________________________________ Removal (Fig. 201)_______
A. Special Tools and Equipment
(1) 3MIT65B80190 - Wing Landing Gear Door Locks.
B. References
(1)
中国航空网 www.aero.cn
航空翻译 www.aviation.cn
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