S 714-051-C00
(20)
Operate the VBV system to the open and then the closed positions (AMM 75-32-00/201 [External Pressure Source]), while you do a check for correct operation.
S 414-057-C00
(21)
Close the thrust reverser (AMM 78-31-00/201). S 414-058-C00
(22)
Close the fan cowl panel (AMM 71-11-02/201).
WARNING:_______ OBEY THE INSTRUCTIONS IN THE PROCEDURE TO CLOSE THE THRUST
REVERSERS. IF YOU DO NOT OBEY THE INSTRUCTIONS WHEN YOU CLOSE
THE THRUST REVERSERS, INJURIES TO PERSONS OR DAMAGE TO
EQUIPMENT CAN OCCUR.
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75-32-03
ALL ú ú C01 Page 411 ú Mar 15/96
BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
////////////////////////A / /
CFM56 ENGINES
737-300/400/500/ /MAINTENANCE MANUAL ////////////////////////
BLEED VALVE AND MASTER BALLSCREW ACTUATOR - INSPECTION/CHECK
____________________________________________________________
1. General
_______
A. The inspection of the variable bleed valve (VBV) and master ballscrew actuator is a visual inspection for general condition.
TASK 75-32-03-006-001-C00
2. Variable Bleed Valve and Master Ballscrew Actuator Inspection
_____________________________________________________________
A. Consumable Materials
(1) D00579 Water repellant (CP2857)
B. References
(1)
AMM 71-11-02/201, Fan Cowl Panels
(2)
AMM 72-33-03/401, Fan Duct Panel
(3)
AMM 75-32-03/401, Bleed Valve and Master Ballscrew Actuator
(4)
AMM 78-31-00/201, Thrust Reverser System
C. Access
(1)
Location Zones 506 Engine No. 1 - 9 o'clock position on the fan frame 606 Engine No. 2 - 9 o'clock position on the fan frame
(2)
Access Panels
5783L Engine No. 1 - Thrust Reverser Half
5838R Engine No. 2 - Thrust Reverser Half
D. Procedure
S 016-007-C00
(1) Open the fan cowl panel (AMM 71-11-02/201).
S 016-008-C00
WARNING: OBEY THE INSTRUCTIONS IN THE PROCEDURE TO OPEN THE THRUST
_______ REVERSERS. IF YOU DO NOT OBEY THE INSTRUCTIONS WHEN YOU OPEN THE THRUST REVERSERS, INJURIES TO PERSONS OR DAMAGE TO EQUIPMENT CAN OCCUR.
(2)
Open the left thrust reverser (AMM 78-31-00/201).
(3)
Remove the 9 o'clock fan duct panel (AMM 72-33-03/401).
S 216-004-C00
(4)
Examine these components:
S 016-003-C00
(a) Examine the master bleed valve door for these:
1) Distortion is not permitted, replace the bleed valve (AMM 75-32-03/401).
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75-32-03
ALL ú ú C01 Page 601 ú Jul 15/97
BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
////////////////////////A / /
CFM56 ENGINES
737-300/400/500/ /MAINTENANCE MANUAL ////////////////////////
CAUTION:_______ A DAMAGED SEAL HAS AN IMPACT ON THE ENGINE
PERFORMANCE AND THE EGT MARGIN LOSS. A LOSS IN
ENGINE PERFORMANCE CAN OCCUR IF YOU DO NOT REPLACE
THE SEAL.
2) Seal damage is permitted, if the engine parameters are in the limits. a) If the engine parameters are not in the limits, replace
the bleed valve (AMM 75-32-03/401).
(b) Lubricate the exposed sides of the uniballs, with three to four drops of water repellant (CP2857). 1) Let the lubricant soak for 2-3 minutes. 2) Manually turn the uniballs in all directions.
NOTE: If binding or frozen slightly, use an open-end
____ wrench on the linkage to turn the rod end.
3) Apply three to four more drops of lubricant if it is necessary. 4) Move the uniballs in all directions until movement is smooth and free. 5) Wipe off the excess lubricant.
S 416-005-C00
(5) Install the 9 o'clock fan duct panel (AMM 72-33-03/401).
S 416-009-C00
WARNING: OBEY THE INSTRUCTIONS IN THE PROCEDURE TO CLOSE THE THRUST
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