(7)
Close the fan cowl panel (AMM 71-11-02/201).
S 416-010-C00
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CFM56 ENGINES
737-300/400/500/ /MAINTENANCE MANUAL ////////////////////////
BLEED VALVE AND BALLSCREW ACTUATOR - REMOVAL/INSTALLATION
_________________________________________________________
1. General
_______
A. This procedure supplies removal and installation instructions for the bleed valve and ballscrew actuators.
B. For this procedure the Variable Bleed Valve (VBV) doors will be referred to as VBV doors.
C. The installation procedure contains a check of the door position of the bleed valve.
D. To get access to the bleed valve and ballscrew actuator you must do the steps that follow:
(1)
Open the thrust reverser half.
(2)
Open the fan duct panel.
E. The 12 variable bleed valves have there are 11 bleed valve and ballscrew actuators installed on the fan frame.
F. The installation procedure is the same for all of the bleed valve and ballscrew actuators.
TASK 75-32-04-004-001-C00
2. Remove the Bleed Valve and Ballscrew Actuator
_____________________________________________
A. References
(1)
AMM 72-33-03/401, Fan Duct Panels
(2)
AMM 78-31-00/201, Thrust Reverser System
B. Access
(1)
Location Zones
506 Engine No. 1 - Fan Frame
606 Engine No. 2 - Fan Frame
(2)
Access Panels 5739L/5783L Thrust Reverser Half - Engine No. 1 5839R/5838R Thrust Reverser Half - Engine No. 2
C. Procedure (Fig. 401)
S 014-002-C00
(1) Open the applicable thrust reverser half (AMM 78-31-00/201).
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CFM56 ENGINES
737-300/400/500/ /MAINTENANCE MANUAL ////////////////////////
SEE A
SEE B(11 LOCATIONS)
FWD
A
Bleed Valve and Ballscrew Actuator Installation Figure 401 (Sheet 1)
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CFM56 ENGINES
737-300/400/500/ /MAINTENANCE MANUAL ////////////////////////
HOOK
SEE C
A
BLEED VALVE AND BALLSCREW ACTUATOR
A DOOR HOLES SETTING YOKE
YOKE END PUSHER B YOKE END PROTECTING BOOT SHAFT VBV DRIVE
CAPTIVE BOLTS UPPER HORIZONTAL BLEED VALVE DOOR
LOWER VERTICAL CAPTIVE BOLTS SEAL
C
SETTING YOKE
YOKE END
VBV DOOR PUSHER
MAX. CLEARANCE:
0.02 INCH (0.5 MM)
FAN FRAME
A-A S-M56-MM-1008-(1)-00-B
Bleed Valve and Ballscrew Actuator Installation
Figure 401 (Sheet 2)
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