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29-11-05
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BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
A
757 MAINTENANCE MANUAL
ENGINE-DRIVEN PUMP (EDP) - INSPECTION/CHECK
___________________________________________
1. General_______
A. This procedure contains one task. This task is a check for internal damage of the engine-driven pump.
TASK 29-11-05-206-001
2. Internal Damage Check for the Engine-Driven Pump (EDP)______________________________________________________
A. General
(1)
This procedure does a check for damage of the EDP after it operates in these conditions:
(a)
Operation with the shutoff valve for the EDP supply closed
(b)
Operation without a supply of hydraulic fluid.
(2)
If you operate an EDP without a fluid supply, for less than 5 minutes, no maintenance is necessary. Do not add the time of the different incidents together. If you operate an EDP for more than 5 minutes without a supply of fluid, do this procedure.
B. References
(1)
AMM 29-00-00/601, Hydraulic Power
(2)
AMM 29-11-00/201, Main (Left, Right, and Center) Hydraulic Systems
(3)
AMM 29-11-05/401, Engine-Driven Pump (EDP)
(4)
AMM 29-11-17/401, System L and R EDP Pressure/Case Drain Filter Module and Components
C. Procedure
NOTE: The operation of the EDP without hydraulic fluid can cause metal
____ contamination of the fluid. Make sure you operate the EDP for at least one minute with a supply of fluid. Then, do a check of the filter elements. This will let the metal contamination move to the filter.
S 036-002
(1)
Remove the filter elements from the filter module for the EDP pressure/case drain (AMM 29-11-17/401).
(2)
Examine each filter element for metal contamination.
S 216-003
EFFECTIVITYùùùùùùùùùùùùùùùùùùùùùùùùùùùùùù. ú
29-11-05
ALL ú ú 01 Page 601 ú May 28/99
BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
A
757
MAINTENANCE MANUAL
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