(b)
AIRPLANES WITHOUT THE ENGINE INSTRUMENT SYSTEM (EIS); Make sure these circuit breakers are closed: 1) P6 Overhead Load Control Center
a) ENG 1 N2 TACH INDICATION
b) ENG 2 N2 TACH INDICATION
(c)
AIRPLANES WITH THE ENGINE INSTRUMENT SYSTEM (EIS);
Make sure these circuit breakers are closed:
1) P6 Overhead Load Control Center
a) EIS PRIMARY 2 (E1)
b) EIS PRIMARY 4 (E2)
(d)
Put the start switch in the GRD position.
(e)
Release the start switch.
(f)
Make sure the start switch stays in the GRD position when you release it.
(g)
Open the ENG 1 and ENG 2 START VALVE circuit breakers.
(h)
Make sure the start switch goes back to the OFF position.
S 765-022-C00
(5) Do the steps that follow to measure the voltage of the start switch on the applicable engine:
(a)
Make sure these circuit breakers are closed:
1) ENG 1
2) ENG 2 START VALVE
(b)
Put the engine ignition switch in the IGN R position and the start switch in the GRD position and hold.
(c)
Make sure the DC voltage across pin 2 to ground of the connector, D424, is 28 |2 volts DC.
(d)
Release the start switch.
EFFECTIVITYùùùùùùùùùùùùùùùùùùùùùùùùùùùùùù. ú
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BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
////////////////////////A / /
CFM56 ENGINES
737-300/400/500/ /MAINTENANCE MANUAL ////////////////////////
(e)
Jumper across pin 4 to ground of the plug, D424.
(f)
Make sure the START VALVE OPEN light is on.
(g)
Remove the jumper across pin 4 to ground of the plug, D424.
(h)
Make sure the START VALVE OPEN light is not on.
F. Put the Airplane Back to its Usual Condition
S 435-026-C00
(1) Remove all the jumpers and reconnect the connectors.
S 415-032-C00
WARNING: OBEY THE INSTRUCTIONS IN THE PROCEDURE TO CLOSE THE THRUST
_______ REVERSER. IF YOU DO NOT OBEY THE INSTRUCTIONS, INJURY TO PERSONS OR DAMAGE TO EQUIPMENT CAN OCCUR.
(2)
Close the right and left thrust reverser (AMM 78-31-00/201).
S 415-033-C00
(3)
Close the right and left fan cowl panel (AMM 71-11-02/201).
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BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
