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ú 01 Page 202
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BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
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747-400 MAINTENANCE MANUAL
~............................................................................... | CONDITION | CONDITION | PROCEDURE TO CORRECT THE CONDITION | | NO. | | | ................................................................................. | 6. | A failure of the | 1. Do a check of the filters for the | | | pressure filter element | flight control package to find the | | | that occurs with a pump | level of the contamination. If | | | failure that causes | there is contamination, flush the | | | hydraulic fluid | system (Ref par. 6). | | | contamination | 2. Flush the case drain line (Ref | | | | par. 7 or 8, as applicable). | | | | 3. Replace the pressure filter | | | | elements (AMM 29-11-23/201). | | | | Replace the applicable case drain | | | | filter element (AMM 29-11-18/201). | | | | 4. Do a check of the differential | | | | pressure indicator for the return | | | | module. If it has extended, refer | | | | to condition No. 4. | ................................................................................. | 7. | A pressure filter | 1. Get a sample of the reservoir | | | failure that occurs with| fluid. If there are signs of | | | a pump failure | contamination, flush the system | | | | (Ref par. 6). | | | | 2. Replace the elements in the pressure| | | | filter module (AMM 29-11-23/201). | ................................................................................. | 8. | The hydraulic system is | 1. It is not necessary to flush the | | | opened for a component | system. | | | replacement or for | | | | general repairs | | ................................................................................. | 9. | There is a high acid | 1. It is not necessary to flush the | | | content in the | system. | | | hydraulic fluid | 2. Replace the hydraulic fluid in the | | | | system (Ref par. 10). | 2...........….........................….........................................1
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29-11-00
ALL ú ú 05 Page 203 ú Feb 18/02
BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
A
747-400
MAINTENANCE MANUAL
EFFECTIVITYùùùùùùùùùùùùùùùùùùùùùùùùùùùùùù. ú
29-11-00
ALL ú ú 01 Page 204 ú Feb 18/02
BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
A
747-400 MAINTENANCE MANUAL
TASK 29-11-00-802-001
2. Hydraulic System Pressurization With a Hydraulic Service Cart_____________________________________________________________
A. Standard Tools and Equipment
(1)
Hydraulic Service Cart - This cart must supply a flow of BMS 3-11 fire-resistant hydraulic fluid at 30-40 gpm at 3000 psig.
B.
References
(1)
AMM 12-12-01/301, Hydraulic Systems
(2)
AMM 24-22-00/201, Manual Control
(3)
AMM 32-00-30/201, Landing Gear Door Locks
(4)
AMM 36-00-00/201, Pneumatic System
(5)
AMM 54-62-00/201, Nacelle Strut Access Panels
C.
Access
(1)
Location Zone 454 System 1 - Strut Aft Fairing 464 System 2 - Strut Aft Fairing 735 System 2 - Wing Landing Gear Wheel Well 474 System 3 - Strut Aft Fairing 745 System 3 - Wing Landing Gear Wheel Well 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
(1)
Supply electrical power (AMM 24-22-00/201).
S 862-003
(2)
Close these circuit breakers:
(a)
P7 Circuit Breaker Panel
1) 7F3 HYDRAULICS HYDIM 1
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