BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.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

FROM SHEET 1 (BLOCK 3)

DO THIS PROCEDURE:
REVERSER FAULT LIGHT "ISO VLV
OPEN" OR "CONT VLV DEPLOY"
STAYS ON WHEN REVERSER IS
REVERSER OPERATES NORMALLY (FIG. 119).

DO THIS PROCEDURE: REVERSER FAULT LIGHT ("SLEEVE

DISAGREE") STAYS ON WHEN REVERSER IS RETRACTED.
REVERSER OPERATES NORMALLY
(FIG. 120).

6 IF YOU FIND A DIFFERENT COMBINATION OF LIGHTS THAN THOSE LISTED ABOVE, REPLACE THE ENGINE ACCESSORY UNIT.
The Reverser Fault Light Stays On When Reverser Is Retracted.
The Reverser Operates Normally.
Figure 117 (Sheet 2)

F13347
 EFFECTIVITYùùùùùùùùùùùùùùùùùùùùùùùùùùùùùù. AIRPLANES WITH SIXTEEN LIGHT EAU ú

 71-00-50
 WITH AND WITHOUT SYNC LOCKS  ú CONFIG 7 ú C01 Page 161 ú Jul 15/95
BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
////////////////////////
A / /
REVERSER FAULT LIGHTS ("ISO VLV OPEN" 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 VALVE CLOSES (AMM 78-31-03/501).
____ THE ISOLATION VALVE
NOTE: CLOSES APPROXIMATELY 10 SEC 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) NO
CFM56 ENGINES
737-300/400/500/ /MAINTENANCE MANUAL ////////////////////////
PREREQUISITES
MAKE SURE THESE CIRCUIT BREAKERS ARE CLOSED: ENG 1 SYNC LOCK
2 ENG 1 THR REV CONT SYS
 ENG 1 THR REV IND SYS ENG 2 SYNC LOCK
2 ENG 2 SYNC LOCK-ALTN
2
ENG 2 THR REV CONT SYS
 ENG 2 THR REV CONT SYS-ALTN
2
 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
_______ BE CAREFUL WHEN YOU DO WORK NEAR THE THRUST
WARNING: REVERSER AND WHEN YOU OPERATE THE FLIGHT DECK CONTROLS. INJURY TO PERSONS OR DAMAGE TO EQUIPMENT CAN OCCUR.
YES

10 EXTEND THE THRUST REVERSER
20 REMOVE THE UNWANTED
(AMM 78-31-00/201).
DO THE DEACTIVATION PROCE-DURE FOR THE THRUST REVERSERFOR GROUND MAINTENANCE (AMM 78-31-00/201).
EXAMINE THE TRACKS AND SLIDERS FOR UNWANTED MATERIALWHICH CAN JAM THE THRUST REVERSER SLEEVE.
DO YOU SEE UNWANTED MATERIAL? NO

SEE SHEET 2 (BLOCK 11)
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 MATERIAL. REPAIR AS NECES-SARY, OR REPLACE THE THRUST REVERSER HALF (AMM 78-31-01/ 401).

Reverser Fault Lights (ISO VLV OPEN and RESTOW) Stay On When Reverser
Is Retracted. Reverser Operates Normally.
Figure 118 (Sheet 1)

C97156
 EFFECTIVITYùùùùùùùùùùùùùùùùùùùùùùùùùùùùùù. AIRPLANES WITH SIXTEEN LIGHT EAU ú

 71-00-50
 WITH AND WITHOUT SYNC LOCKS  ú  CONFIG  7
 ú  C01  Page 162
 ú  Jul 15/95 

BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
////////////////////////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
　
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