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A
747-400 MAINTENANCE MANUAL
(b)
Connect these lines to the hydraulic reservoir: 1) The ADP supply 2) The EDP supply 3) The pressure return 4) The pressure relief 5) The pneumatic supply.
(c)
Connect the electrical connector to the transmitter for the hydraulic fluid quantity.
S 864-023
(3)
Close the E25 HYD FLUID QTY IND circuit breaker on the P414 main power distribution panel.
S 614-024
(4)
Do this task: "Hydraulic Reservoir Servicing" (AMM 12-12-01/301).
S 864-025
(5)
Pressurize the hydraulic reservoir (AMM 29-11-00/201).
S 794-026
(6)
Examine the reservoir installation for leakage.
(a)
If you find leakage, repair the cause of it.
S 414-028
CAUTION: MAKE SURE YOU LATCH THE FAIRING DOORS ON THE TRAILING EDGE
_______ CORRECTLY. DAMAGE CAN OCCUR IF THE DOORS OPEN DURING A FLIGHT.
(7) Close the fairing doors on the trailing edge of the strut (AMM 54-62-00/201).
TASK 29-11-01-404-036
4. Hydraulic System Reservoir Support Beam Inspection (Fig. 401)
__________________________________________________
A. References
(1) CMM 29-11-36
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747-400
MAINTENANCE MANUAL
(2)
CMM 29-11-45
B.
Access
(1)
Location Zone
454 System 1 - Strut Aft Fairing
464 System 2 - Strut Aft Fairing
474 System 3 - Strut Aft Fairing
484 System 4 - Strut Aft Fairing
(2)
Access Panel
454A Trailing Edge Fairing Doors - System 1
464A Trailing Edge Fairing Doors - System 2
474A Trailing Edge Fairing Doors - System 3
484A Trailing Edge Fairing Doors - System 4
C.
Procedure
S 214-037
(1)
Visually inspect the hydraulic reservoir:
(a)
Make sure the reservoir is clean.
(b)
Visually inspect the support beam-to-reservoir flange upper and lower joints.
(c)
If any cracks are found, replace the support beam(s) per (CMM 29-11-36) or (CMM 29-11-45), as applicable.
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747-400 MAINTENANCE MANUAL
RESERVOIR SAMPLE VALVE - REMOVAL/INSTALLATION
_____________________________________________
1. General_______
A. This procedure contains the tasks to remove and install the reservoir sample valve. The installation task also contains a test of the installation of the valve.
B. You can get access to the reservoir sample valve through fairing doors on the trailing edge of the strut.
C. It is necessary to drain the reservoir to remove the reservoir sample valve.
TASK 29-11-02-004-001
2. Reservoir Sample Valve Removal (Fig. 401)______________________________
A. Equipment
(1)
Container - 15 gallon (57 liter) capacity (for hydraulic fluid)
B.
References
(1)
AMM 29-11-00/201, Main Hydraulic Supply System
(2)
AMM 29-17-01/201, Reservoir Pressurization Module
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