71-00-50
 WITH AND WITHOUT SYNC LOCKS  ú CONFIG 7 ú C01 Page 153 ú Jul 15/94
BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
REVERSER FAULT LIGHTS ("VALVE DIS-AGREE" AND "RESTOW) STAY ON WHEN REVER-SER IS RETRACTED. REVERSER OPERATES NORMALLY.

1 EXTEND AND RETRACT THE
THRUST REVERSER SLEEVES
(AMM 78-31-00/201).
EXAMINE THE GAPS AT THE UPPER ACTUATOR ROD END STOPS BEFORE THE ISOLATION VALVECLOSES (AMM 78-31-03/501).
NOTE:THE ISOLATION VALVE CLOSES APPROXIMATELY 10 SECONDS AFTER THE REVERSE THRUST LEVER IS MOVED FULLY FORWARD AND DOWN.
DOES THE ROD STOP TOUCH THE GLAND NUT?

YES SEE SHEET 2 (BLOCK 13)
////////////////////////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
 ENG 2 THR REV CONT SYS-ALTN

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 RETRACTED
WARNING:  BE CAREFUL WHEN YOU DO WORK NEAR THE THRUST REVERSER AND WHEN YOU OPERATE THE FLIGHT DECK CONTROLS. INJURY TO PERSONS OR DAMAGE TO EQUIPMENT CAN OCCUR.
NO

10 EXTEND THE THRUST REVERSER(AMM 78-31-00/201).
DO THE DEACTIVATION PROCE-
DURE FOR THE THRUST REVERSER
FOR GROUND MAINTENANCE
(AMM 78-31-00/201).
EXAMINE THE TRACKS AND
SLIDERS FOR FOREIGN OBJECTS
WHICH CAN JAM THE THRUST
REVERSER SLEEVE.
 DO YOU SEE FOREIGN OBJECTS? NO

SEE SHEET 2 (BLOCK 11)
YES

20 REMOVE THE FOREIGN OBJECTS. REPAIR AS NECESSARY, OR REPLACE THE THRUST REVERSER HALF (AMM 78-31-01/401).

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 Fault Lights (VALVE DISAGREE and RESTOW) Stay On When Reverser
is Retracted. Reverser Operates Normally.
Figure 114 (Sheet 1)

EFFECTIVITYùùùùùùùùùùùùùùùùùùùùùùùùùùùùùù. AIRPLANES WITH SIX LIGHT EAU ú

 71-00-50
 WITH AND WITHOUT SYNC LOCKS  ú  CONFIG  7
 ú  C01  Page 154
 ú  Jul 15/94 

BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
C97149
////////////////////////A / /
CFM56 ENGINES
737-300/400/500/ /MAINTENANCE MANUAL ////////////////////////
FROM SHEET 1 FROM SHEET 1 (BLOCK 1) (BLOCK 10)
YES

NO NO

11 EXAMINE THE INSTALLATION
OF THE ROTARY FLEX SHAFTS
(AMM 78-31-00/401).
IS THE INSTALLATION OK?

YES NO12 EXAMINE THE REVERSER ACTU-ATORS FOR EVIDENCE OF BINDING OR OTHER MALFUNCTION.

ARE THE ACTUATORS OK?

YES YES13 AT EACH OF THE UPPER ACTUATOR ROD ENDS, EXAMINE THE GAP BETWEEN THE ROD STOP AND THE GLAND NUT (AMM 78-31-03/ 501).

 DOES THE GAP EXCEED 0.033 IN. (0.84 MM)?
NO NO
14 DO THE ACTIVATION PROCE-DURE FOR THE THRUST REVERSER SYSTEM FOR GROUND MAINTENANCE (AMM 78-31-00/201).

EXTEND THE THRUST REVERSER SLEEVES (AMM 78-31-00/201).
DO THE DEACTIVATION PROCE-
DURE FOR THE THRUST REVERSER
FOR GROUND MAINTENANCE
(AMM 78-31-00/201).
HOLD A PIECE OF STEEL
AGAINST THE PROXIMITY SENSORS,
S831 (LEFT REVERSER HALF), AND
S832 (RIGHT REVERSER HALF).
MOVE THE REVERSE THRUST
LEVER TO THE REVERSE IDLE
POSITION.
PUSH AND RELEASE THE
APPLICABLE "T/R RESET" BUTTON
ON THE ENGINE ACCESSORY UNIT,
M528. OPEN AND CLOSE THE
CIRCUIT BREAKER, "THR REV CONT
SYS".
DO THE VALVE DISAGREE" AND
"RESTOW" LIGHTS REMAIN ON

AFTER APPROXIMATELY

10 SECONDS?
YES

24 ADJUST THE SENSOR-TO-TARGET GAP OF THE PROXIMITY SENSORS, S831 AND S832 (AMM 78-34-03/201).

25 REPLACE THE ENGINE ACCES-SORY UNIT, M528 (AMM 78-34-06/ 401).

Reverser Fault Lights (VALVE DISAGREE and RESTOW) Stay On When Reverser
is Retracted. Reverser Operates Normally.
Figure 114 (Sheet 2)
　
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