(c)
Install a cap on the open port to keep contamination out.
TASK 29-11-23-402-085
11. Differential Pressure Indicator Installation (Fig. 201)____________________________________________
A. Consumable Materials
(1)
D00153 Fluid - Hydraulic, Fire Resistant, BMS 3-11
B.
References
(1)
AMM 29-11-00/201, Main Hydraulic Supply System
(2)
AMM 54-62-00/201, Nacelle Strut Access Panels
(3)
IPC 29-11-23 Fig. 1
C.
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 454AL Trailing Edge Fairing Doors - System 1 464AL Trailing Edge Fairing Doors - System 2 474AL Trailing Edge Fairing Doors - System 3 484AL Trailing Edge Fairing Doors - System 4
D.
Procedure
S 642-086
(1)
Lubricate the screws, the packings, the backup rings, and the component threads with hydraulic fluid.
S 422-087
(2)
Install the indicator for differential pressure:
(a)
Remove the cap from the port.
(b)
Install the packings and the backup rings on the indicator.
(c)
Install the indicator in the pressure module with the screws. 1) On the pressure module of the Sterer type, Tighten the screws to 12-15 pound-inches (1.4-1.7 N.m).
2) On the pressure module of the Ronson/Hydraulic type, Tighten the screws to 20-30 pound-inches (2-3 N.m).
EFFECTIVITYùùùùùùùùùùùùùùùùùùùùùùùùùùùùùù. ú
29-11-23
ALL ú ú 02 Page 216 ú Feb 18/02
BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
A
747-400
MAINTENANCE MANUAL
S 862-089
(3)
Pressurize the hydraulic system (AMM 29-11-00/201).
S 792-114
(4)
Examine the indicator for leakage.
(a)
If you find leakage, repair the cause of the leak.
S 862-090
(5) Release the pressure in the hydraulic system if it is not necessary (AMM 29-11-00/201).
S 412-092
CAUTION: MAKE SURE YOU LATCH THE DOORS ON THE TRAILING EDGE FAIRING
_______ CORRECTLY. IF THE DOORS OPEN DURING A FLIGHT, THIS CAN CAUSE DAMAGE TO THE DOORS.
(6) Close the left door on the applicable trailing edge fairing (AMM 54-62-00/201).
TASK 29-11-23-002-093
12. Ground Service Disconnect Removal (Fig. 201)
_________________________________
A. References
(1)
AMM 29-11-00/201, Main Hydraulic Supply System
(2)
AMM 36-00-00/201, Pneumatic System
(3)
AMM 54-62-00/201, Nacelle Strut Access Panels
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 454AL Right Trailing Edge Fairing Door - System 1 464AL Right Trailing Edge Fairing Door - System 2 474AL Right Trailing Edge Fairing Door - System 3 484AL Right Trailing Edge Fairing Door - System 4
C.
Procedure
S 012-094
(1) Open the right door on the applicable trailing edge fairing (AMM 54-62-00/201).
EFFECTIVITYùùùùùùùùùùùùùùùùùùùùùùùùùùùùùù. ú
29-11-23
ALL ú ú 02 Page 217 ú Feb 18/02
BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
A
747-400 MAINTENANCE MANUAL
S 862-095
WARNING: MAKE SURE YOU RELEASE THE PNEUMATIC SYSTEM PRESSURE BEFORE YOU
_______ OPEN THE HYDRAULIC SYSTEM. THE PNEUMATIC SYSTEM PRESSURIZES THE HYDRAULIC RESERVOIR. HYDRAULIC FLUID THAT HAS PRESSURE CAN CAUSE INJURY TO PERSONS.
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