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 FUSESTO 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 103 (Sheet 5)

C97100
 EFFECTIVITYùùùùùùùùùùùùùùùùùùùùùùùùùùùùùù. AIRPLANES WITH SIX LIGHT EAU ú

 71-00-50
 WITH SYNC LOCKS  ú CONFIG 7 ú C01 Page 116 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BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.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 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 PUSHED IN 
THRUST REVERSER SLEEVES ARE RETRACTED 
REVERSER DOES NOT  THRUST REVERSER DEACTIVATED FOR GROUND MAINTENANCE 
EXTEND.  "REVERSER  (AMM 78-31-00/201) 
UNLOCKED" LIGHT 
DOES NOT COME ON.  _______WARNING:  BE CAREFUL WHEN YOU DO WORK NEAR THE THRUST REVERSER AND WHEN YOU OPERATE THE FLIGHT 
REVERSE INTERLOCK  DECK CONTROLS.  INJURY TO PERSONS OR DAMAGE 
DOES NOT RELEASE.  TO EQUIPMENT CAN OCCUR. 

YES

NO
10 EXAMINE THE ADJUSTMENT OF THE REVERSER STOW SWITCH, S825(S827)(AMM 78-34-05/201).

IS THE ADJUSTMENT OK?
NO YES
NO

2 LIFT THE REVERSE THRUST
LEVER TO THE REVERSE IDLE
POSITION.

 DOES THE CONTROL CIRCUIT BREAKER STAY CLOSED?
YES
22 DO A CHECK FOR AN EQUIP-MENT SHORT TO GROUND (WDM 78-32-11,-21).

REPAIR THE PROBLEMS THAT YOU FIND.

SEE SHEET 2
(BLOCK 3)

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 Extend. REVERSER UNLOCKED Light Does Not Come On.
Reverse Interlock Does Not Release.
Figure 104 (Sheet 1)

C97102
 EFFECTIVITYùùùùùùùùùùùùùùùùùùùùùùùùùùùùùù. AIRPLANES WITH SIX LIGHT EAU ú

 71-00-50
 WITHOUT SYNC LOCKS  ú  CONFIG  7
 ú  C01  Page 117
 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 NO NO

3 DOES THE REVERSER LIGHT
11 DO A CONTINUITY TEST 23 REPAIR THE CIRCUIT
COME ON? (WDM 78-32-11,-21): (WDM 78-32-11,-21).

1. BETWEEN SPLICE SM101 (SM98)
YES AND THE RADIO ALTIMETER SWITCHES, M50 AND M415, AND THE AIR SENSING RELAY, R276
2. BETWEEN THE CONTROL CIRCUIT BREAKER AND SPLICE SM101 (SM98).
IS THERE CONTINUITY?
YES

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

NO

4 DEPRESSURIZE THE A (B)
HYDRAULIC SYSTEM.
WAIT A MINIMUM OF
30 SECONDS.
 DOES THE "REVERSER" LIGHT
GO OFF?

YES
SEE SHEET 3 (BLOCK 5)
NO
12 DISCONNECT PLUG D3052 (D3056) FROM THE REVERSER CON-

TROL MODULE, M1173 (M1174)
(WDM 78-32-11,-21).
IS THERE 28V DC BETWEEN
PIN 2 AND GROUND?
YES
YES

13 IS THERE CONTINUITY
BETWEEN PLUG D3052 (D3056),
PIN 7, AND GROUND
(WDM 78-32-11,-21)?

NO
YES
14 DISCONNECT THE PLUG FROM
　
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