THE CONTROL STAND, CONNECTOR
D5148P (WDM 78-32-11,-21).
IS THERE CONTINUITY
BETWEEN THE RECEPTACLE, PINS 4
AND 6?
NO
NO
15 EXAMINE THE ADJUSTMENT OF

THE REVERSER ARM SWITCH, S824
(S826)(AMM 78-34-05/201).
IS THE ADJUSTMENT OK? YES
25 REPAIR THE OPEN CIRCUIT FROM THE REVERSER CONTROL VALVE MODULE, M1173 (M1174), PLUG D3052 (D3056), PIN 2, TO SPLICE SM100 (SM99), IN THE P6-2 CIRCUIT BREAKER PANEL (WDM 78-32-11,-21).

26 REPLACE THE REVERSER CON-TROL VALVE MODULE M1173 (M1174)(AMM 78-34-01/401).

27 REPAIR THE OPEN CIRCUIT FROM THE REVERSER CONTROL VALVE MODULE, M1173 (M1174), PLUG D3052 (D3056), PIN 7, TO THE REVERSER ARM SWITCH, S824 (S826), OR FROM THE ARM SWITCH TO SPLICE SM101 (SM98).

28 ADJUST THE SWITCH
(AMM 78-34-05/201).

29 REPLACE THE SWITCH (AMM 78-34-05/201).

Reverser Does Not Extend. REVERSER UNLOCKED Light Does Not Come On.
Reverse Interlock Does Not Release.
Figure 104 (Sheet 2)

C97105
 EFFECTIVITYùùùùùùùùùùùùùùùùùùùùùùùùùùùùùù. AIRPLANES WITH SIX LIGHT EAU ú

 71-00-50
 WITHOUT SYNC LOCKS  ú CONFIG 7 ú C01 Page 118 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BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.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 4)

YES NO YES

5 DISCONNECT PLUG D3052
16 DISCONNECT THE PLUG FROM 30 REPAIR THE OPEN CIRCUIT
(D3056) FROM THE REVERSER CON-THE CONTROL STAND, CONNECTORFROM THE REVERSER CONTROL
TROL MODULE, M1173 (M1174) D8315 (D8313) VALVE MODULE, M1173 (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

NO

17 EXAMINE THE ADJUSTMENT OF 31 ADJUST THE SWITCH
THE REVERSER CONTROL SWITCH, (AMM 78-34-04/201).
S828 (S829)(AMM 78-34-04/201).

IS THE ADJUSTMENT OK?
YES
32 REPLACE THE SWITCH (AMM 78-34-04/201).
NO

6 IS THERE CONTINUITY 33 REPAIR THE OPEN CIRCUIT
BETWEEN PLUG D3052 (D3056), FROM THE REVERSER CONTROL
PIN 5, AND GROUND VALVE MODULE, M1173 (M1174),
(WDM 78-32-11,-21)? PLUG D3052 (D3056), PIN 5, TO

SPLICE SM101 (SM98), IN THEYES P6-2 CIRCUIT BREAKER PANEL (WDM 78-32-11,-21).

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

IF THE PROBLEM CONTINUES, REPLACE THE HYDRAULIC FUSES TO THE THRUST REVERSER (AMM 78-34-07/401).
Reverser Does Not Extend. REVERSER UNLOCKED Light Does Not Come On.
Reverse Interlock Does Not Release.
Figure 104 (Sheet 3)

C97106
 EFFECTIVITYùùùùùùùùùùùùùùùùùùùùùùùùùùùùùù. AIRPLANES WITH SIX LIGHT EAU ú

 71-00-50
 WITHOUT SYNC LOCKS  ú CONFIG 7 ú C01 Page 119 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 SYNC LOCK
ENG 1 THR REV CONT SYS
ENG 1 THR REV IND SYS
ENG 2 SYNC LOCK
ENG 2 SYNC LOCK-ALTN
ENG 2 THR REV CONT SYS

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).
AIRPLANES WITH THRUST REVERSER SYNC LOCKS
Reverser Does Not Extend. REVERSER UNLOCKED Light Does Not Come On.
Reverse Interlock Does Not Release.
Figure 105 (Sheet 1)

C97109
 EFFECTIVITYùùùùùùùùùùùùùùùùùùùùùùùùùùùùùù. AIRPLANES WITH SIXTEEN LIGHT EAU ú

 71-00-50
 WITH AND WITHOUT SYNC LOCKS  ú  CONFIG  7
　
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