BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.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 YES NO

3 PUSH THE APPLICABLE TEST 11 DO A CHECK FOR 28V DC AT
23 EXAMINE THE CIRCUIT FROM
BUTTON ON THE EAU. EXAMINE THE REVERSER CONTROL MODULE. SPLICE SM100 (SM99) TO THE
THE APPLICABLE "ISO VLV OPEN" IF VOLTAGE IS NOT PRESENT, DO THRUST REV CONT CIRCUIT
AND "CONT VLV DEPLOY" LIGHTS: A CHECK AT SPLICE SM100 (SM99) BREAKER (WDM 78-32-11,-21).

(WDM 78-32-11,-21). REPAIR THE PROBLEMS THAT
ENG 1_____ ENG 2
 IS THERE 28V DC? YOU FIND.
S833 AND S834 S830 AND S839

YES
 ARE BOTH OF THE APPLICABLE
LIGHTS OFF?

NO NO NO
3A DOES THE AIRPLANE HAVE
23A DO A CHECK FOR GROUND AT SYNC LOCKS?
SPLICE, SM101 (SM98) (WDM 78-32-11,-21).

YES
YES IF GROUND EXISTS, REPLACE
THE CONTROL VALVE MODULE, SEE SHEET 3 SEE SHEET 3 SEE SHEET 3 M1173 (M1174)(AMM 78-34-01/ (BLOCK 3B) (BLOCK 3C) (BLOCK 11B) 401).
IF GROUND DOES NOT EXIST, REPAIR THE WIRING TO GROUND (WDM 78-32-11,-21).
Reverser Does Not Extend. REVERSER UNLOCKED Light Does Not Come On.
Reverse Interlock Does Not Release.
Figure 105 (Sheet 2)

C97111
 EFFECTIVITYùùùùùùùùùùùùùùùùùùùùùùùùùùùùùù. AIRPLANES WITH SIXTEEN LIGHT EAU ú

 71-00-50
 WITH AND WITHOUT SYNC LOCKS  ú  CONFIG  7
 ú  C01  Page 121
 ú  Jul 15/98 

BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
////////////////////////A / /
CFM56 ENGINES
737-300/400/500/ /MAINTENANCE MANUAL ////////////////////////
FROM SHEET 2 FROM SHEET 2
(BLOCK 3A) (BLOCK 11A)

YES

YES
YES YES

3B ARE BOTH OF THE APPLICABLE 11B MOVE THE L (R) REVERSE
24 IF ONE SLEEVE FAILED TO
LIGHTS ON? THRUST LEVER TO THE FULLY FOR-EXTEND, DO A CHECK FOR GROUND WARD AND DOWN POSITION. AT THE L (R) SLEEVE SYNC LOCK, NO
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.. IF THERE IS NOT GROUND,
CLOSE THE CIRCUIT BREAKER EXAMINE THE CIRCUIT FROM "ENG 1 SYNC LOCK" ("ENG 2 SYNC CONNECTOR D1008 OR D1016, LOCK" AND "ENG 2 SYNC LOCK-PIN 2, TO GROUND. ALTN"). REPAIR THE PROBLEMS THAT YOU
MOVE THE L (R) REVERSE FIND. THRUST LEVER TO THE REVERSE
 IF BOTH SLEEVES FAIL TO
IDLE POSITION.
EXTEND, DO A CHECK FOR 28V DC
DO A CHECK FOR 28V DC ON
AT CONNECTOR D3527 (D3529),FROM SHEET 2
THE L (R) SLEEVE SYNC LOCK,
PIN X1:(BLOCK 3A)
CONNECTOR D1008 OR D1016,
. IF 28V DC DOES NOT EXIST, NO
PIN 1 (PIN 2, GND)REPAIR THE WIRING BETWEEN
(WDM 78-32-51,-61).
CONNECTOR D3527, PIN X1 AND
IS THERE 28V DC?
YES3C IS THE APPLICABLE "ISO VLV

D10634, PIN A2
OPEN" LIGHT OFF?

. IF 28V DC EXISTS, DO A CHECK

FOR GROUND AT CONNECTOR NO
NO
D3527, PIN X2.
SEE SHEET 4
- IF GROUND EXISTS, REPLACE
(BLOCK 11C)
3D IS THE APPLICABLE "CONT
THE SEQUENCE RELAY,
VLV DEPLOY" LIGHT OFF?

R495 (R496).

IF THE PROBLEM CONTINUES, YES
DO A CHECK FOR GROUND AT SPLICE SP2694 (SP366). SEE SHEET 5 . IF GROUND EXISTS,
SEE SHEET 4 (BLOCK 4) REPLACE THE REVERSER
(BLOCK 12) 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. . 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.
Reverser Does Not Extend. REVERSER UNLOCKED Light Does Not Come On.
Reverse Interlock Does Not Release.
Figure 105 (Sheet 3)

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 EFFECTIVITYùùùùùùùùùùùùùùùùùùùùùùùùùùùùùù. AIRPLANES WITH SIXTEEN LIGHT EAU ú
　
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