BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
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CFM56 ENGINES
737-300/400/500/ /MAINTENANCE MANUAL ////////////////////////
SEE SEE SEE
FLIGHT COMPARTMENT
LEFT MASTER CAUTION RIGHT MASTER CAUTION
AND ANNUNCATOR LIGHTS AND ANNUNCATOR LIGHTS
Light Locations for the Fuel Filter Bypass Warning System Test
Figure 503
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BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
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CFM56 ENGINES
737-300/400/500/ /MAINTENANCE MANUAL ////////////////////////
S 735-013-C00
(10) Do a check that the FILTER BYPASS light on the pilot's overhead panel P5-2 comes on when the pressure is between 10.5 and 12.5 psig (Fig. 503).
NOTE: The bypass valve for the fuel filter opens at 15 |1 psig.
____
S 735-014-C00
(11) The FUEL light and the two MASTER CAUTION lights must also come on.
NOTE: If the FUEL light and/or one of the two MASTER CAUTION lights
____ does not come on, do a test of the components that follow:
-MASTER WARNING and CAUTION lights (AMM 33-15-00/501).
S 735-015-C00
(12) Slowly decrease the air pressure.
(a) Make sure the FILTER BYPASS light goes off when the pressure is between 10 and 8 psi.
S 735-016-C00
(13) Set the FUEL light and the two MASTER CAUTION lights.
(a) Do a check that the three lights stay off.
S 095-017-C00
(14)
Remove the pressure gage or the test equipment, if used.
S 095-022-C00
(15)
Disconnect the air pressure source from the pressure gage or test equipment.
S 435-018-C00
(16)
Connect the fuel inlet line between the fuel filter and the pressure switch.
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CFM56 ENGINES
737-300/400/500/ /MAINTENANCE MANUAL ////////////////////////
S 415-024-C00
WARNING:_______ OBEY THE INSTRUCTIONS IN THIS PROCEDURE WHEN YOU CLOSE THE
THRUST REVERSERS. IF YOU DO NOT OBEY THE INSTRUCTIONS,
INJURIES TO PERSONS OR DAMAGE TO EQUIPMENT CAN OCCUR.
(17)
Close the left thrust reverser half (AMM 78-31-00/201).
S 415-019-C00
(18)
Close the left fan cowl panel (AMM 71-11-02/201).
S 865-020-C00
(19)
Remove the electrical power (AMM 24-22-00/201).
(a) Set the BAT switch on the Electrical Meters Battery and Galley Power Module (P5-13) to the OFF position and install a DO-NOT-OPERATE tag.
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ALL ú ú C02 Page 509 ú Mar 12/00
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CFM56 ENGINES
737-300/400/500/ /MAINTENANCE MANUAL ////////////////////////
FUEL FILTER DIFFERENTIAL PRESSURE SWITCH - REMOVAL/INSTALLATION
_______________________________________________________________
1. General_______
A. This procedure gives the steps for the removal and installation of the
fuel filter differential pressure switch.
B. You can find the fuel filter differential pressure switch which is
attached to a bracket at 7:45 o'clock on the fan case below and aft of
the fuel filter.
TASK 73-34-01-004-001-C00
2. Remove Fuel Filter Differential Pressure Switch_______________________________________________
A. Equipment
(1) Container - 5 gallon (20-liter) capacity,
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