REFER TO THE VENDOR MANUAL FOR REPAIR INFORMATION.
REPLACE THE BEARING WHEN THE INTERNAL BEARING CLEARANCE IS LARGER THAN THE MAXIMUM VALUE OF 0.0005.
REFER TO THE OVERHAUL MANUAL FOR REPAIR INFORMATION.
WHEN TURNED BY HAND, THE BEARING MUST TURN SMOOTHLY. REPLACE THE BEARING IF THERE IS INDICATION
OF ROUGHNESS.
RPCP Mechanical Linkage and Override Mechanism Wear Limits Figure 601 (Sheet 7)
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A
747-400 MAINTENANCE MANUAL
ROLLOUT POWER CONTROL PACKAGE ELECTROHYDRAULIC SERVOVALVE
_________________________________________________________ AND SOLENOID VALVE - MAINTENANCE PRACTICES
__________________________________________
1. General_______
A. This procedure contains three tasks. The first task is the removal of the electrohydraulic servovalve (EHSV) or the solenoid valve from the Rollout Power Control Package (RPCP). The second task is the installation of the EHSV or the solenoid valve on the RPCP. The third task is the operational test of the RPCP.
B. The electrohydraulic servovalve (EHSV) and the solenoid valves are on the left, center, and right of the RPCPs. Each RPCP has one EHSV and two solenoid valves.
C. You can find the three RPCPs in the vertical stabilizer, forward of the rudder hinge and aft of the rear spar. The left RPCP (B7087) is on the top, the center RPCP (B7088) is in the middle, and the right RPCP (B7089) is at the bottom.
D. You can get access to the three RPCPs through the access panels 324EL, 324FR, and 324FL on the vertical stabilizer.
TASK 22-13-05-002-020
2. RPCP Electrohydraulic Servovalve and Solenoid Valve Removal___________________________________________________________
A. References
(1)
AMM 06-09-07/201, Fin and Rudder Access Doors and Panels
(2)
AMM 20-11-19/401, O-Ring
(3)
AMM 20-11-28/401, Lockwire
(4)
AMM 24-22-00/201, Manual control
(5)
AMM 29-11-00/201, Main Hydraulic Supply System
B. Access
(1)
Location Zone 324 Vertical Stabilizer Between Rear Spar and Trailing Edge
(2)
Access Panels 324EL Left Side Vertical Stabilizer Midway Down Lower Rudder 324FR Right Side Vertical Stabilizer Between Upper and Lower
Rudder 324FL Left Side Vertical Stabilizer Between Upper and Lower Rudder
C. Prepare for the RPCP Electrohydraulic Servovalve and Solenoid Valve Removal
S 862-021
(1) Supply electrical power (AMM 24-22-00/201).
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747-400
MAINTENANCE MANUAL
ROLLOUT POWER CONTROL PACKAGE (RPCP)
SEE A
2. SOLENOID
VALVE 2
(ENGAGE)
1. RPCP
3. WASHER
(4 LOCATIONS)
4. SCREW
(4 LOCATIONS)
6. 0-RING
2. SOLENOID 5. ELECTROMAGNETIC
VALVE 1 SERVOVALVE
(ARM) 7. GASKET PLATE 3. WASHER
(4 LOCATIONS)
3. WASHER 6. O-RING 4. SCREW
(4 LOCATIONS) 7. GASKET PLATE (4 LOCATIONS)
4. SCREW
(4 LOCATIONS)
A
RPCP Electrohydraulic Servovalve and Solenoid Valve Installation
Figure 201
D20473
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747-400 MAINTENANCE MANUAL
S 862-022
(2) Remove hydraulic power for the applicable hydraulic system
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