(BLOCK 3)
NO

42 REPAIR THE CIRCUIT FROM THE ENGINE ACCESSORY UNIT, M528, PLUG D1458A (D1458B), PIN 21, TO THE CONTROL CIRCUIT BREAKER (WDM 78-32-11,-21).

DO THESE STEPS TO MAKE SURE THE SYSTEM IS SERVICEABLE: . RELEASE THE MANUAL UNLOCK LEVER AT EACH LOCKING ACTUATOR . MAKE SURE THAT EACH SLEEVE AUTOMATICALLY RETRACTS . ON THE ENGINE ACCESSORY UNIT, M528, PUSH THE RESET BUTTON
TO ERASE THE FAULT INDICATIONS . EXTEND AND RETRACT THE REVERSER . MAKE SURE THAT THE OPERATION AND THE INDICATION ARE CORRECT.
Reverser Does Not Retract. REVERSER UNLOCKED Light Stays On When Reverse Thrust Cancelled. Figure 109 (Sheet 1)
C97133
 EFFECTIVITYùùùùùùùùùùùùùùùùùùùùùùùùùùùùùù. AIRPLANES WITH SIX LIGHT EAU ú

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 WITHOUT SYNC LOCKS  ú CONFIG 7 ú C01 Page 138 ú Jul 15/94
BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
////////////////////////A / /
CFM56 ENGINES
737-300/400/500/ /MAINTENANCE MANUAL ////////////////////////
FROM SHEET 1
(BLOCK 2)
NO

YES SEE SHEET 3
3 DEPRESSURIZE THE A (B)

(BLOCK 6)HYDRAULIC SYSTEM.
 WAIT A MINIMUM OF 30 SECONDS.
 DOES THE "REVERSER" LIGHT COME ON?

PLUG D3052 (D3056), PIN 7, TO THE ENGINE ACCESSORY UNIT, M528, PLUG D1458A (D1458B), PIN 24 (WDM 78-32-11,-21).
IS THERE CONTINUITY?

Reverser Does Not Retract. REVERSER UNLOCKED Light Stays On When Reverse Thrust Cancelled. Figure 109 (Sheet 2)
C97134
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BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
////////////////////////A / /
CFM56 ENGINES
737-300/400/500/ /MAINTENANCE MANUAL ////////////////////////
FROM SHEET 2 (BLOCK 3)
YES
YES

6 DISCONNECT PLUG D3052

25 IS THERE CONTINUITY
BETWEEN PLUG D3052 (D3056),
PIN 6, AND GROUND
(WDM 78-32-11,-21)?

YES
50 REPAIR THE OPEN CIRCUIT BETWEEN THE PLUG, PIN 6, AND GROUND GD3044-DC (GD3042-DC) (WDM 78-32-11,-21).

(D3056), FROM THE REVERSER CONTROL VALVE MODULE, M1173(M1174)(WDM 78-32-11,-21).

SWITCH, S825 (S827) (AMM 78-34-05/201).

Reverser Does Not Retract. REVERSER UNLOCKED Light Stays On When Reverse Thrust Cancelled. Figure 109 (Sheet 3)
C97135
 EFFECTIVITYùùùùùùùùùùùùùùùùùùùùùùùùùùùùùù. AIRPLANES WITH SIX LIGHT EAU ú

 71-00-50
 WITHOUT SYNC LOCKS  ú CONFIG 7 ú C01 Page 140 ú Jul 15/94
BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
////////////////////////A / /
CFM56 ENGINES
737-300/400/500/ /MAINTENANCE MANUAL ////////////////////////
PREREQUISITES
MAKE SURE THESE CIRCUIT BREAKERS ARE CLOSED: ENG 1 THR REV CONT SYS ENG 1 THR REV IND SYS
ENG 1 SYNC LOCK ENG 2 SYNC LOCK ENG 2 SYNC LOCK-ALTN ENG 2 THR REV CONT SYS-ALTN ENG 2 THR REV CONT SYS ENG 2 THR REV IND SYS

MAKE SURE THE AIRPLANE IS IN THIS CONFIGURATION: ELECTRICAL POWER IS ON (AMM 24-22-00/201) HYDRAULIC POWER IS ON (AMM 29-15-00/201) ENGINE FIRE SWITCHES ARE PUSHED IN THRUST REVERSER SLEEVES ARE EXTENDED REVERSE THRUST LEVER IN THE REVERSE IDLE POSITION
REVERSER DOES NOT LOCKPIN INSTALLED IN THE THRUST REVERSER CONTROL RETRACT. "REVERSER VALVE (AMM 78-31-00/201) UNLOCKED" LIGHT
_______BE CAREFUL WHEN YOU DO WORK NEAR THE THRUSTWARNING:
STAYS ON WHEN
REVERSER AND WHEN YOU OPERATE THE FLIGHT REVERSE THRUST
DECK CONTROLS. INJURY TO PERSONS OR DAMAGE CANCELLED. TO EQUIPMENT CAN OCCUR.

YES

1 MOVE THE REVERSE THRUST
40 DO A CHECK FOR AN EQUIP-
LEVER FULLY FORWARD AND DOWN.MENT SHORT TO GROUND WAIT 30 SECONDS. (WDM 78-32-11,-21). DOES THE CIRCUIT BREAKER REPAIR THE PROBLEMS THAT "THR REV CONT SYS" OPEN?YOU FIND.

NO
SEE SHEET 2
(BLOCK 2)

DO THESE STEPS TO MAKE SURE THE SYSTEM IS SERVICEABLE:
. ON THE ENGINE ACCESSORY UNIT, M528, PUSH THE RESET BUTTON TO ERASE THE FAULT INDICATIONS
　
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