75-32-04
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BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
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CFM56 ENGINES
737-300/400/500/ /MAINTENANCE MANUAL ////////////////////////
BLEED VALVE AND BALLSCREW ACTUATOR - INSPECTION/CHECK
_____________________________________________________
 1.  General
_______
 A.  The inspection of the variable bleed valve (VBV) and ballscrew actuator is a visual inspection for general condition.
 TASK 75-32-04-006-001-C00
 2.  Variable Bleed Valve and Ballscrew Actuator Inspection
______________________________________________________
 A.  References
 (1)
AMM 72-33-03/401, Fan Duct Panels

 (2)
AMM 75-32-04/401, Bleed Valve and Ballscrew Actuator

 (3)
AMM 78-31-00/201, Thrust Reverser System

 B.  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

 C.  Procedure
 S 016-002-C00
 (1)
Open the left thrust reverser half (AMM 78-31-00/201).

 S 016-003-C00

 (2)
Remove the applicable fan duct panel (AMM 72-33-03/401).

 S 216-004-C00

 (3)
Do a visual inspection of the components that follow:

 (a) Examine the bleed valve doors for these:
 1)  Distortion is not permitted, replace the bleed valve (AMM 75-32-04/401).
 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 75-32-04/401).
 EFFECTIVITYùùùùùùùùùùùùùùùùùùùùùùùùùùùùùù. ú

 75-32-04
 ALL  ú ú C01 Page 601 ú Nov 15/93
BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
////////////////////////A / /
CFM56 ENGINES
737-300/400/500/ /MAINTENANCE MANUAL ////////////////////////
(4)  S 416-005-C00Install the applicable fan duct panel (AMM 72-33-03/401).
 (5)  S 416-006-C00Close the left thrust reverser half (AMM 78-31-00/201).

 EFFECTIVITYùùùùùùùùùùùùùùùùùùùùùùùùùùùùùù. ú

 75-32-04
 ALL  ú ú C01 Page 602 ú Nov 15/93
BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
////////////////////////A / /
CFM56 ENGINES
737-300/400/500/ /MAINTENANCE MANUAL ////////////////////////
VARIABLE BLEED VALVE FEEDBACK CABLE - REMOVAL/INSTALLATION
__________________________________________________________
 1.  General
_______
 A.  This procedure gives the removal and installation of the variable bleed valve (VBV) feedback cable.
 B.  The cable connects to the VBV feedback arm on the aft end of the main engine control (MEC).
 C.  It goes up through the forward part of the 6 o'clock strut area.
 D.  It connects to the feedback reverser arm on the stop mechanism of the bleed valve at the 9 o'clock position.
 TASK 75-32-05-004-001-C00
 2.  Remove the Variable Bleed Valve Feedback Cable
______________________________________________
 A.  References
 (1)  AMM 78-31-00/201, Thrust Reverser System
 B.  Access
 (1)  
Location Zones
 506 Engine No. 1 - Aft end of MEC
 606 Engine No. 2 - Aft end of MEC

 (2)  
Access Panels 5783L/5739L Engine No. 1 - Thrust Reverser Half 5838R/5839R Engine No. 2 - Thrust Reverser Half

 C.  Procedure (Fig. 401)
 S 014-002-C00
 (1)  
Open the thrust reverser halves (AMM 78-31-00/201).

 S 034-003-C00

 (2)  
Disconnect the end of the VBV feedback cable from the reverser arm on the stop mechanism of the bleed valve as follows:
　
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