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29-15-00
ALL ú ú 01 Page 511 ú Mar 15/99
BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
A
737-300/400/500MAINTENANCE MANUAL
S 735-090
(9)
Put the applicable switch, HYD PUMPS ENG 1 (for the A hydraulic system), or HYD PUMPS ENG 2 (for the B hydraulic system) in the ON position.
S 985-091
(10)
Motor or operate the applicable engine at idle speed
(Ref 71-00-00/201).
(a)
Make sure the applicable LOW PRESSURE light (ENG 1 or ENG 2) goes out.
(b)
Make sure the hydraulic pressure becomes stable between 2900-3200 psig.
S 735-092
(11) Put the ENG 1 or ENG 2 switch in the OFF position.
(a) Make sure the applicable LOW PRESSURE light (ENG 1 ro ENG 2) comes on.
NOTE: It can be necessary to operate the flight controls to
____ remove pressure from the hydraulic system.
S 735-093
(12) Put the ENG 1 or ENG 2 switch back in the ON position.
(a)
Make sure the applicable LOW PRESSURE light (ENG 1 or ENG 2) goes out.
(b)
Make sure the hydraulic pressure becomes stable between 2900-3200 psig.
S 985-094
(13)
Stop the engine (Ref 71-00-00/201).
S 865-095
(14)
Put the ENG 1 or ENG 2 switch in the OFF position.
S 795-096
(15)
Make sure the EDP does not have a leak.
F. Put the Airplane Back to Its Usual Condition
S 415-097
(1)
Close the fan cowl panels on the engine (Ref 71-11-02/201).
S 865-098
(2)
Remove the DO-NOT-CLOSE tags and close these circuit breakers:
(a)
P6-2 Panel
1) PTU/LG BYP V CONT 1
2) PTU/LG BYP V CONT 2
(b)
P6-11 Panel
1) STBY HYD PUMP NORMAL
EFFECTIVITYùùùùùùùùùùùùùùùùùùùùùùùùùùùùùù. ú
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A
737-300/400/500MAINTENANCE MANUAL
(c) P6-12 Panel
1) STBY HYD PUMP ALTERNATE
S 865-099
(3) Remove electrical power if it is not necessary (Ref 24-22-00/201).
TASK 29-15-00-735-100
5. System Test for the Standby Hydraulic System____________________________________________
A. Standard Tools and Equipment
(1)
Hydraulic service cart (with a pressure gage) - that can supply 20 gpm at 3000 psi - filled with BMS 3-11 hydraulic fluid.
(2)
Pressure gage - 0 to 3500 psi
B. References
(1)
24-22-00/201, Manual Control
(2)
29-15-00/201, Hydraulic Systems A, B, and Standby
C. Access
(1) Location Zones
101/102 Control Cabin
216/217 Main Wheel Wells
D. Prepare for the Test
S 865-101
(1) Close these circuit breakers:
(a)
P6-2 Panel 1) NOSE GEAR AIR/GND 2) FLIGHT CONTROL SHUTOFF VALVE STBY RUD 3) LANDING GEAR AIR/GND RELAY & LIGHTS
(b)
P6-3 Panel 1) INDICATOR MASTER DIM BUS BAT 2) INDICATOR MASTER DIM BUS NO. 1 DC 3) INDICATOR MASTER DIM BUS NO. 2 DC 4) INDICATOR MASTER DIM BUS SECT 1 5) INDICATOR MASTER DIM BUS SECT 2 6) INDICATOR MASTER DIM BUS SECT 3 7) INDICATOR MASTER DIM BUS SECT 4
EFFECTIVITYùùùùùùùùùùùùùùùùùùùùùùùùùùùùùù. ú
29-15-00
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BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
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