NO
NO

5 DISCONNECT THE PLUG FROM
THE CONTROL STAND, CONNECTOR
D5148 (WDM 78-32-11,-21).

IS THERE CONTINUITY
FROM THE REVERSER CONTROL VALVE MODULE, M1173 (M1174), PLUG D3052 (D3056), PIN 2, TO SPLICE SM100 (SM99) (WDM 78-32-11,-21).
1
YES23 EXAMINE THE ADJUSTMENT OF THE REVERSER ARM SWITCH, S824(S826)(AMM 78-34-05/201).
IS THE ADJUSTMENT OK?

BETWEEN THE RECEPTACLE, PINS 4
NO
AND 5 (1 AND 2)?
47 ADJUST THE SWITCH
YES (AMM 78-34-05/201).

YES
24 DO A CONTINUITY TEST

48 REPLACE THE ENGINE ACCES-FROM THE REVERSER CONTROL SORY UNIT, M528 (AMM 78-34-06/
VALVE MODULE, M1173 (M1174), 401).
PLUG D3052 (D3056), PIN 7, TO
THE ENGINE ACCESSORY UNIT,
M528, PLUG D1458A (D1458B),
PIN 24 (WDM 78-32-11,-21).

IS THERE CONTINUITY?
NO

Reverser Does Not Retract. REVERSER UNLOCKED Light Stays On When Reverse Thrust Cancelled. Figure 107 (Sheet 2)
C97126
 EFFECTIVITYùùùùùùùùùùùùùùùùùùùùùùùùùùùùùù. AIRPLANES WITH TWO LIGHT EAU ú

 71-00-50
 WITHOUT SYNC LOCKS  ú  CONFIG  7
 WITH REVISED STOW SWITCH WIRING  ú  C01  Page 131
 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BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.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 3)

YES YES YES

6 DISCONNECT PLUG D3052
25 IS THERE CONTINUITY 50 REPAIR THE OPEN CIRCUIT (D3056), FROM THE REVERSER BETWEEN PLUG D3052 (D3056), BETWEEN THE PLUG, PIN 6, AND CONTROL VALVE MODULE, M1173PIN 6, AND GROUND GROUND GD3044-DC (GD3042-DC)

Reverser Does Not Retract. REVERSER UNLOCKED Light Stays On When Reverse Thrust Cancelled. Figure 107 (Sheet 3)
C97127
 EFFECTIVITYùùùùùùùùùùùùùùùùùùùùùùùùùùùùùù. AIRPLANES WITH TWO LIGHT EAU ú
 71-00-50 WITHOUT SYNC LOCKS ú CONFIG 7 WITH REVISED STOW SWITCH WIRING ú C01 Page 132
 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BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.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
. DO THE OPERATIONAL TEST FOR THE THRUST REVERSER (AMM 78-31-00/501).
Reverser Does Not Retract. REVERSER UNLOCKED Light Stays On When Reverse Thrust Cancelled. Figure 108 (Sheet 1)
C97128
 EFFECTIVITYùùùùùùùùùùùùùùùùùùùùùùùùùùùùùù. AIRPLANES WITH SIX LIGHT EAU ú

 71-00-50
　
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