S 485-014-C00
(3)
Connect an air pressure source to the nipple for the oil supply pressure on the low oil pressure warning switch.
D. Do the test for the Low Oil Pressure Warning System
S 865-015-C00
(1) Supply electrical power to the applicable engine.
(a) Remove the DO-NOT-OPERATE tag from the BAT switch.
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CFM56 ENGINES
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SEE A
ELECTRICAL CONNECTOR OIL SUPPLY PRESSURE TUBE
OIL PRESSURE TRANSMITTER PRESSURE LOW OIL SWITCH WARNING
FWD
ELECTRICAL
CONNECTOR
VENT PRESSURE TUBE FROM THE TGB
A
Low Oil Pressure Warning System Test Connections
Figure 501
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CFM56 ENGINES
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S 865-016-C00
(2) Make sure these circuit breakers are closed:
(a) P6 Load Control Center
1) INDICATOR - MASTER DIM BUS (9 locations)
2) DIM & TEST
S 215-017-C00
(3)
The amber LOW OIL PRESSURE light on the center instrument panel, P2, must be on.
S 865-018-C00
(4)
Put the LIGHTS switch on the center instrument panel, P2, to the DIM position.
(a) The LOW OIL PRESSURE light must come on, dim.
S 865-019-C00
(5) Put the LIGHTS switch to the BRT position.
(a) The LOW OIL PRESSURE light must come on, bright.
S 865-020-C00
(6) Slowly increase air pressure to 15.25 psi (105.1 kPa) and monitor the LOW OIL PRESSURE light.
(a) The light must go off when or before the pressure is at
15.25 psi (105.1 kPa).
S 865-021-C00
(7) Slowly decrease the air pressure and monitor the Low Oil Pressure light.
(a) The light must come on before or when the pressure is 12.25 psi
(84.4 kPa).
E. Put the Engine Back to its Usual Condition
S 085-022-C00
(1)
Disconnect the air pressure supply from the low oil pressure warning switch.
(a) Discard the O-ring.
(2)
Lubricate and install a new O-ring on the pressure switch nipple.
(3)
Connect the elbow to the low oil pressure warning switch.
(4)
Close the left fan cowl panel (AMM 71-11-02/201).
S 435-023-C00
S 435-026-C00
S 415-028-C00
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CFM56 ENGINES
737-300/400/500/ /MAINTENANCE MANUAL ////////////////////////
S 865-029-C00
(5) Remove the electrical power.
(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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