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

10B MOVE THE L (R) REVERSE
22A 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 SYNC ASSEMBLY, M1639 (M1640), TO LOCK" AND "ENG 2 SYNC LOCK-THE CIRCUIT BREAKER "ENG 1 ALTN"). SYNC LOCK" ("ENG 2 SYNC LOCK"
REMOVE THE SYNC LOCK LATCH AND "ENG 2 SYNC LOCK-ALTN") OR RELAY, R477 (R479).FROM PIN A1 OR B1, TO THE CIR-
CLOSE THE CIRCUIT BREAKER CUIT BREAKER "ENG 1 SYNC LOCK" "ENG 1 SYNC LOCK" ("ENG 2 SYNC ("ENG 2 SYNC LOCK" AND "ENG 2 LOCK" AND "ENG 2 SYNC LOCK-SYNC LOCK-ALTN"). ALTN"). REPAIR THE PROBLEMS THAT
MOVE THE L (R) REVERSE YOU FIND.THRUST REVERSE LEVER TO THEREVERSE IDLE POSITION.
DO A CHECK FOR 28V DC AT CONNECTOR D10634 (D10638), PIN A1 AND B1.
IS THERE 28V DC AT EACHPIN?
YES

22B REPLACE THE SYNC LOCK LATCH RELAY, R477 (R479).
IF THE PROBLEM CONTINUES, EXAMINE THE CIRCUIT FROM THESYNC LOCK LATCH RELAY, R477 (R479), TO THE SYNC LOCK, V148 OR V150 (WDM 78-32-51,-61).
REPAIR THE PROBLEMS THAT YOU FIND.
Reverser Does Not Extend. REVERSER UNLOCKED Light Does Not Come On.
Reverse Interlock Does Not Release.
Figure 101 (Sheet 3)

C97087
 EFFECTIVITYùùùùùùùùùùùùùùùùùùùùùùùùùùùùùù. AIRPLANES WITH TWO LIGHT EAU ú

 71-00-50
 WITH SYNC LOCKS  ú  CONFIG  7
 WITH REVISED STOW SWITCH WIRING  ú  C01  Page 106
 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BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.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 2)

YES NO NO

3 DEPRESSURIZE THE A (B)

11 DISCONNECT PLUG D3052
23 REPAIR THE OPEN CIRCUIT HYDRAULIC SYSTEM.(D3056) FROM THE REVERSER FROM THE REVERSER CONTROL WAIT A MINIMUM OF CONTROL VALVE MODULE, M1173 VALVE MODULE, M1173 (M1174), 30 SECONDS. (M1174)(WDM 78-32-11,-21). PLUG D3052 (D3056), PIN 2, TO DOES THE "REVERSER" LIGHT IS THERE 28V DC BETWEEN SPLICE SM100 (SM99), IN THE GO OFF? PIN 2 AND GROUND?P6-2 CIRCUIT BREAKER PANEL (WDM 78-32-11,-21).

YES  YES YES

12 IS THERE CONTINUITY
24 REPLACE THE REVERSER CON-BETWEEN PLUG D3052 (D3056), TROL VALVE MODULE, M1173
PIN 7, AND GROUND (M1174)(AMM 78-34-01/401).
(WDM 78-32-11,-21)?

NO
YES

13 DISCONNECT THE PLUG FROM
25 REPAIR THE OPEN CIRCUIT THE CONTROL STAND, CONNECTOR FROM THE REVERSER CONTROL D5148P (WDM 78-32-11,-21).VALVE MODULE, M1173 (M1174),
IS THERE CONTINUITY PLUG D3052 (D3056), PIN 7, TO BETWEEN THE RECEPTACLE, PINS 4 THE REVERSER ARM SWITCH, S824 AND 6? (S826), OR FROM THE ARM SWITCH
TO SPLICE SM101 (SM98).
NO
NO
14 EXAMINE THE ADJUSTMENT OF
26 ADJUST THE SWITCH
THE REVERSER ARM SWITCH, S824 (AMM 78-34-05/201).
(S826)(AMM 78-34-05/201).

IS THE ADJUSTMENT OK?
YES

27 REPLACE THE SWITCH (AMM 78-34-05/201).
NO YES

4 DISCONNECT PLUG D305215 DISCONNECT THE PLUG FROM 28 REPAIR THE OPEN CIRCUIT
(D3056) FROM THE REVERSER THE CONTROL STAND, CONNECTOR FROM THE REVERSER CONTROL
CONTROL VALVE MODULE, M1173 D8315 (D8313) VALVE MODULE, M1173 (M1174),
(M1174)(WDM 78-32-11,-21). (WDM 78-32-11,-21). PLUG D3052 (D3056), PIN 4, TO

IS THERE 28V DC BETWEEN IS THERE CONTINUITY SPLICE SM100 (SM99), IN THE
PIN 4 AND GROUND?BETWEEN THE RECEPTACLE, PINS 4 P6-2 CIRCUIT BREAKER PANEL
AND 5 (22 AND 23)? (WDM 78-32-11,-21).

YES
NO

SEE SHEET 5 NO
(BLOCK 5)  16 EXAMINE THE ADJUSTMENT OF 29 ADJUST THE SWITCH THE REVERSER CONTROL SWITCH,(AMM 78-34-04/201). S828 (S829)(AMM 78-34-04/201).
IS THE ADJUSTMENT OK?
YES
30 REPLACE THE SWITCH (AMM 78-34-04/201).
Reverser Does Not Extend. REVERSER UNLOCKED Light Does Not Come On.
Reverse Interlock Does Not Release.
Figure 101 (Sheet 4)

C97088
 EFFECTIVITYùùùùùùùùùùùùùùùùùùùùùùùùùùùùùù. AIRPLANES WITH TWO LIGHT EAU ú
　
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