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CFM56 ENGINES
737-300/400/500/ /MAINTENANCE MANUAL //////////////////////// 
NO N2 ROTOR ROTATION WHEN START INITIATED PREREQUISITES 
MAKE SURE THESE CIRCUIT BREAKERS ARE OPEN AND ATTACH A DO-NOT-CLOSE TAG: ENGINE NO. 2 RIGHT IGNITION ENGINE NO. 2 LEFT IGNITION ENGINE NO. 1 RIGHT IGNITION ENGINE NO. 1 LEFT IGNITION 
MAKE SURE THE AIRPLANE IS IN THIS CONFIGURATION: ELECTRICAL POWER IS ON (AMM 24-22-00/201) PNEUMATIC POWER IS ON (AMM 36-00-00/201) PUT THE START LEVERS IN THE CUTOFF POSITION AIRPLANE ON AN OPEN AIR RAMP FOR AN APU START
NO 
YES
DO THE PROCEDURE TO DRY 
11 DISCONNECT ELECTRICAL CON-MOTOR THE ENGINE (AMM 71-00-00/ NECTOR D424 FROM THE V6 START 201). MOVE THE START SWITCH VALVE (WDM 80-11-11).TO THE GROUND POSITION. MEASURE FOR 28V DC AT CON-
DOES THE START VALVE OPEN NECTOR, PIN 2 (PIN 1, GROUND). LIGHT COME ON? IS 28V DC PRESENT?
YES 
NO 22 REPLACE THE APPROPRIATE SEE SHEET 2 ENGINE START SWITCH, S266 OR (BLOCK 2) S267 (WDM 80-11-02). IF THE PROBLEM CONTINUES, EXAMINE THE CIRCUIT FROM CON-NECTOR, ENG 1 (2) START VALVE, V6, PIN 2 (PIN 1, GROUND), THROUGH THE S2 ENG 1 (2), S266 (S267) START/IGNITION SWITCH, TO THE CB ENG 1 (2) START VALVE, FOR AN OPEN CIRCUIT (WDM 80-11-02). REPAIR THE PROBLEMS THAT YOU FIND. 
1 
No N2 Rotor Rotation When Start Initiated 
Figure 101 (Sheet 1)
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CFM56 ENGINES
737-300/400/500/ /MAINTENANCE MANUAL //////////////////////// 
FROM SHEET 1 
(BLOCK 1)
YES 
NO 
YES
YES NO 24 REPLACE THE ENGINE STARTER (AMM 80-11-01/401). GO TO BLOCK 4. 
NO ____DO NOT DO AN ENGINE
NOTE: START BEFORE BLOCK 4. YES 
NO
4 DO THE APU OPERATION TEST 25 DO THE TROUBLESHOOTING OF 
(AMM 49-11-00/501). THE APU FOR INDICATION 
DID THE APU OPERATE PROBLEMS (AMM 49-00-00/101).
CORRECTLY?
YES 
NO
5 MONITOR THE PNEUMATIC DUCT 
26 DO THE TROUBLESHOOTING OF 
PRESSURE INDICATOR ON THE THE APU FOR DUCT PRESSURE 
OVERHEAD PANEL, P5. FLUCTUATIONS (AMM 49-00-00/ 
IS THE DUCT PRESSURE 101). STABLE?
YES SEE SHEET 3 
(BLOCK 6)
No N2 Rotor Rotation When Start Initiated 
Figure 101 (Sheet 2)
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B06919
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CFM56 ENGINES
737-300/400/500/ /MAINTENANCE MANUAL //////////////////////// 
FROM SHEET 2 (BLOCK 5)
YES
YES
6 
SHUT DOWN THE APU
(AMM 49-11-00/501).
DO A CHECK OF THE MAGNETIC CHIP DETECTORS (AMM 79-00-00/ 601).
 ARE INDICATIONS OF AN ENGINE AND/OR GEARBOX FAILURE FOUND?
NO 
NO 
NO
7 MANUALLY TURN THE N2 ROTOR17 A NEW ENGINE (PRODUCTION 中国航空网 www.aero.cn 航空翻译 www.aviation.cn 本文链接地址:737-300 400 500 AMM 飞机维护手册 动力装置 POWER PLANT 1(173)