71-00-50
WITH AND WITHOUT SYNC LOCKS ú CONFIG 7
ú C01 Page 141
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BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.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 1)
NO YES SEE SHEET 4
2 EXAMINE THE APPLICABLE
(BLOCK 3)
"ISO VLV OPEN" AND "CONT VLV
DEPLOY" LIGHTS:
__________ENG 2ENG 1
S833 AND S834S830 AND S839
ARE BOTH OF THE APPLICABLE
LIGHTS OFF?
NO
YES
LIGHTS ON? (BLOCK 5)
2A ARE BOTH OF THE APPLICABLE SEE SHEET 5
NO NO2B DOES THE AIRPLANE HAVE
41 OPEN THE CIRCUIT BREAKER
SYNC LOCKS?
"ENG 1 THRUST REV CONT" ("ENG 2 THRUST REV CONT" ANDYES "ENG 2 THRUST REV CONT-ALTN").
REMOVE THE ENGINE ACCES-2C IS THE APPLICABLE "CONT YES
SORY UNIT, M528, FROM THE E3
VLV DEPLOY" LIGHT ON?
RACK. CLOSE THE CIRCUIT BREAKERNO "ENG 1 THRUST REV CONT" ("ENG 2 THRUST REV CONT" ANDYES 21 OPEN THE CIRCUIT BREAKER
"ENG 2 THRUST REV CONT-ALTN"). "ENG 1 SYNC LOCK" ("ENG 2 SYNC
DO A CHECK FOR 28V DC LOCK" AND "ENG 2 SYNC LOCK-
BETWEEN CONNECTOR D1458AALTN").
(D1458B), PIN 21, AND GROUND. DISCONNECT THE L (R)
IF THERE IS 28V DC, SLEEVE SYNC LOCK, CONNECTOR
REPLACE THE ENGINE ACCESSORYD1008 OR D1016.
UNIT, M528 (AMM 78-34-06/401). CLOSE THE CIRCUIT BREAKER
IF THERE IS NOT 28V DC, "ENG 1 SYNC LOCK" ("ENG 2 SYNC
EXAMINE THE CIRCUIT FROM THELOCK" AND "ENG 2 SYNC LOCK-
ENGINE ACCESSORY UNIT, M528, ALTN").
CONNECTOR D1458A (D1458B), MOVE THE REVERSE THRUST
PIN 21, TO THE CONTROL CIRCUIT LEVER FROM THE STOW POSITION,
BREAKER. THEN PUT IT BACK IN THE STOW
REPAIR THE PROBLEMS THAT POSITION.
YOU FIND. IN LESS THAN 120 SECONDS
FROM THE TIME YOU PUT THE
YES
42 DO A CHECK FOR GROUND AT
REVERSE THRUST LEVER BACK IN
THE L (R) SLEEVE SYNC LOCK,
THE STOW POSITION, DO A CHECK
CONNECTOR D1008 OR D1016,
FOR 28V DC ON THE L (R) SLEEVE
PIN 2.
SYNC LOCK, CONNECTOR D1008
IF THERE IS GROUND,OR D1016, PIN 1 (PIN 2, REPLACE THE L (R) SLEEVE SYNC
GROUND)(WDM 78-32-51,-61).
LOCK (AMM 78-34-10/401).
IS THERE 28V DC?
IF THERE IS NOT GROUND,
NO EXAMINE THE CIRCUIT FROM THE L (R) SLEEVE SYNC LOCK, CONNECTOR D1008 OR D1016,
SEE SHEET 3
PIN 2, TO GROUND.
(BLOCK 21A)
REPAIR THE PROBLEMS THAT YOU FIND.
Reverser Does Not Retract. REVERSER UNLOCKED Light Stays On When Reverse Thrust Cancelled. Figure 110 (Sheet 2)
C97137
EFFECTIVITYùùùùùùùùùùùùùùùùùùùùùùùùùùùùùù. AIRPLANES WITH SIXTEEN LIGHT EAU ú
71-00-50
WITH AND WITHOUT SYNC LOCKS ú CONFIG 7
ú C01 Page 142
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 21)
NO
YES
21A OPEN THE CIRCUIT BREAKER
"ENG 1 SYNC LOCK" ("ENG 2 SYNC
LOCK" AND "ENG 2 SYNC LOCK-ALTN").
REMOVE THE SYNC LOCK LATCH RELAY, R477 (R479).
CLOSE THE CIRCUIT BREAKER "ENG 1 SYNC LOCK" ("ENG 2 SYNC LOCK" AND "ENG 2 SYNC LOCK-ALTN").
MOVE THE REVERSE THRUST LEVER FROM THE STOW POSITION, THEN PUT IT BACK IN THE STOW POSITION.
IN LESS THAN 120 SECONDS FROM THE TIME YOU PUT THE REVERSE THRUST LEVER BACK IN THE STOW POSITION, DO A CHECK FOR GROUND AT THE SYNC LOCK LATCH RELAY, R477 (R479), CONNECTOR D10634 (D10638), PIN Y2.
DID YOU GET A GROUND?
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