S 794-021
(4)
Make sure there are no leaks at the relief valve.
S 114-022
CAUTION: QUICKLY CLEAN THE INSTALLATION AREA OF ALL HYDRAULIC FLUID.
_______ HYDRAULIC FLUID CAN CAUSE DAMAGE TO THE AIRPLANE EQUIPMENT.
(5) Clean all hydraulic fluid from the installation area
(AMM 12-25-01/301).
S 094-023
WARNING: USE THE PROCEDURE IN AMM 32-00-15/201 TO REMOVE THE DOOR LOCKS.
_______ THE DOORS OPEN AND CLOSE QUICKLY AND CAN CAUSE INJURY TO PERSONS OR DAMAGE TO EQUIPMENT.
(6)
Remove door locks from the landing gear doors and close the doors (AMM 32-00-15/201).
(7)
Remove hydraulic power if it is not necessary (AMM 29-11-00/201).
S 864-024
EFFECTIVITYùùùùùùùùùùùùùùùùùùùùùùùùùùùùùù. ú
29-11-29
ALL ú ú 02 Page 404 ú May 28/99
BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
A
757 MAINTENANCE MANUAL
RESERVOIR PRESSURIZATION CHECK VALVE - ADJUSTMENT/TEST
______________________________________________________
1. General_______
A. There is one task in this subject. This task is a reservoir
pressurization check valve test.
TASK 29-11-30-705-001
2. Reservoir Pressurization Check Valve Test_________________________________________
A. General
(1) This procedure does a test of the check valves which keep air pressure in the hydraulic system reservoirs after the pneumatic power is removed. This is a test of each main hydraulic system.
B. Equipment
(1)
Air pressure gage - 0 to 100 psi range -commercially available
(2)
A source of clean, dry air or nitrogen, that is
controlled from 0 to 100 psi maximum pressure -commercially available
C. References
(1)
AMM 06-41-00/201, Fuselage Access Doors and Panels
(2)
AMM 24-22-00/201, Electrical Power - Control
(3)
AMM 36-00-00/201, Pneumatic Control
D. Access
(1)
Location Zone
139 Forward Keel Beam
193/194 Wing to Body Fairings
212 Control Cabin
(2)
Access Panels 193HL/194ER Environmental Control System Components
E. Procedure (Fig. 501)
S 865-008
(1) Supply electrical power (AMM 24-22-00/201).
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29-11-30
ALL ú ú 01 Page 501 ú Jan 28/01
BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
A
757
MAINTENANCE MANUAL
SEE A
FILTER
PRESSURE SUPPORT
GAGE PORT BRACKET
FWD
PNEUMATIC
SUPPLY LINE
PRESSURIZATION RESERVOIR MANUAL (2 LOCATIONS)
LINE BLEED VALVE
(3 LOCATIONS)
RESERVOIR PRESSURIZATION MODULE
A
MOISTURE
VENT TRAP
CHARGING
VALVE VENT
MOISTURE VENT TRAP DEPRESSURIZATION VALVE MODULE
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