YES
SEE SHEET 2
(BLOCK 3)

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
. DO THE OPERATIONAL TEST FOR THE THRUST REVERSER (AMM 78-31-00/501).

Reverser Does Not Extend. REVERSER UNLOCKED Light Does Not Come On.
Reverse Interlock Does Not Release.
Figure 103 (Sheet 1)

C97096
 EFFECTIVITYùùùùùùùùùùùùùùùùùùùùùùùùùùùùùù. AIRPLANES WITH SIX LIGHT EAU ú

 71-00-50
 WITH SYNC LOCKS  ú  CONFIG  7
 ú  C01  Page 112
 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BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.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)

YES NONO

3 DOES THE REVERSER LIGHT 11 DO A CHECK FOR 28V DC AT 23 EXAMINE THE CIRCUIT FROM
COME ON?  SPLICE SM100 (SM99) SPLICE SM100 (SM99) TO THE
(WDM 78-32-11,-21). THRUST REV CONT CIRCUIT

YES
IS THERE 28V DC? BREAKER (WDM 78-32-11,-21). REPAIR THE PROBLEMS THAT
YES
SEE SHEET 4 YOU FIND.(BLOCK 4)
YES
11A MOVE THE L (R) REVERSE 24 IF ONE SLEEVE FAILED TO
THRUST LEVER TO THE FULLY FOR-EXTEND, DO A CHECK FOR GROUND
WARD AND DOWN POSITION. AT THE L (R) SLEEVE SYNC LOCK,
OPEN THE CIRCUIT BREAKER CONNECTOR D1008 OR D1016,

"ENG 1 SYNC LOCK" ("ENG 2 SYNCPIN 2:
LOCK" AND "ENG 2 SYNC LOCK-. IF GROUND EXISTS, REPLACE

ALTN"). THE L (R) SLEEVE THRUST
DISCONNECT THE L (R) REVERSER SYNC LOCK, V148 OR

SLEEVE SYNC LOCK, CONNECTOR
V150 (AMM 78-34-10/401)
D1008 OR D1016.

 CLOSE THE CIRCUIT BREAKER . IF THERE IS NOT GROUND,
"ENG 1 SYNC LOCK" ("ENG 2 SYNCEXAMINE THE CIRCUIT FROM

LOCK" AND "ENG 2 SYNC LOCK-CONNECTOR D1008 OR D1016,
ALTN"). PIN 2, TO GROUND.

MOVE THE L (R) REVERSE REPAIR THE PROBLEMS THAT YOU THRUST LEVER TO THE REVERSEFIND.
IDLE POSITION.
IF BOTH SLEEVES FAIL TO
DO A CHECK FOR 28V DC ON
EXTEND, DO A CHECK FOR 28V DC
THE L (R) SLEEVE SYNC LOCK,
AT CONNECTOR D3527 (D3529),
CONNECTOR D1008 OR D1016,
PIN X1.PIN 1 (PIN 2, GND)
. IF 28V DC DOES NOT EXIST,(WDM 78-32-51,-61).
REPAIR THE WIRING BETWEEN
IS THERE 28V DC?

CONNECTOR D3257, PIN X1 AND NO D10634, PIN A2.

. IF 28V DC EXISTS, DO A CHECK FOR GROUND AT CONNECTOR
SEE SHEET 3
D3527, PIN X2.
(BLOCK 11B)
-IF GROUND EXISTS, REPLACE THE SEQUENCE RELAY, R495 (R496). IF THE PROBLEM CONTINUES, DO A CHECK FOR GROUND AT SPLICE SP2694 (SP366). . IF GROUND EXISTS,

REPLACE THE REVERSER
CONTROL VALVE MODULE,
M1173 (M1174)
(AMM 78-34-01/401).

. IF GROUND DOES NOT EXIST, REPAIR THE WIRING TO GROUND (WDM 78-32-11,-21).

-IF GROUND DOES NOT EXIST, DO A CHECK FOR GROUND AT THE TIME DELAY MODULE, M1666 (M1667), PIN B.
(CONTINUED)

Reverser Does Not Extend. REVERSER UNLOCKED Light Does Not Come On.
Reverse Interlock Does Not Release.
Figure 103 (Sheet 2)

C97097
 EFFECTIVITYùùùùùùùùùùùùùùùùùùùùùùùùùùùùùù. AIRPLANES WITH SIX LIGHT EAU ú

 71-00-50
 WITH SYNC LOCKS  ú  CONFIG  7
 ú  C01  Page 113
 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 2
(BLOCK 11A)
24 (CONTINUED)

NO . IF GROUND EXISTS, REPLACE THE TIME DELAY MODULE, M1666 (M1667).

. IF GROUND DOES NOT EXIST, EXAMINE THE WIRING FROM THE TIME DELAY MODULE, M1666 (M1667), PIN B, TO GROUND. REPAIR THE PROBLEMS THAT YOU FIND.

NO

11B MOVE THE L (R) REVERSE
24A EXAMINE THE CIRCUIT FROM
THRUST LEVER TO THE FULLY FOR-CONNECTOR D10634 (D10638),
WARD AND DOWN POSITION. PIN X1, THROUGH THE AUTO-OPEN THE CIRCUIT BREAKER THROTTLE MICROSWITCH PACK "ENG 1 SYNC LOCK" ("ENG 2 SYNCASSEMBLY, M1639 (M1640), TO LOCK" AND "ENG 2 SYNC LOCK-THE CIRCUIT BREAKER "ENG 1 ALTN").
　
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