(b)
Disengage the 8-point fitting at the opposite end.
S 034-005-C00
(4)
Loosen the four captive bolts that attach the bleed valve and ballscrew actuator to the fan frame.
S 024-006-C00
(5)
Remove the actuator from the engine.
TASK 75-32-04-404-007-C00
3. Install the Bleed Valve and Ballscrew Actuator
______________________________________________
A. Equipment
(1)
856A2501 - Wrench, Ratchet, Dual Purpose - VBV Manual Actuation, CFM International, P.O. Box 15514, Cincinnati, OH 45215
(2)
856A3368 - Yoke, Setting - VBV Doors, CFM International
(3)
856A3408 - Gage, Master - VBV Door Setting Yoke, CFM International
B. References
(1)
AMM 72-33-02/401, Fan Duct Panels
(2)
AMM 75-32-00/201, Variable Bleed Valve System
(3)
AMM 78-31-00/201, Thrust Reverser System
C. 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
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D. Install the bleed valve and ballscrew actuator
S 724-008-C00
(1) Do a check that the translating nut in the bleed valve and ballscrew actuator moves freely.
(a)
Operate the ballscrew actuator with the VBV drive shaft.
(b)
Use the dual purpose ratchet wrench.
S 864-009-C00
(2)
Put the bleed valve near the closed position.
S 424-010-C00
(3)
Put the bleed valve and ballscrew actuator in its location on the fan frame.
S 434-011-C00
(4)
Tighten, by hand, the four captive bolts that attach the bleed valve and ballscrew actuator to the fan frame.
NOTE: Do not lubricate the bolt threads.
____
S 214-012-C00
(5)
Do a check that the VBV door is correctly in the center of the fan frame seat.
S 434-013-C00
(6)
Tighten the two vertical bolts to 105-115 pound-inches
(11.9-13.0 Newton meters).
S 434-026-C00
(7)
Tighten the two horizontal bolts to 70-90 pound-inches
(8-10.0 Newton meters).
S 434-028-C00
(8)
ENGINES PRE-CFMI-SB 72-580; Do a check of the position of the bleed valve door (Fig. 401, Sheet 2)
(a) Install the setting yoke on the bleed valve door as follows:
1) Before you install the setting yoke, use the master gage to make sure that the yoke is set correctly. a) If it is not set correcly, adjust it.
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CFM56 ENGINES
737-300/400/500/ /MAINTENANCE MANUAL ////////////////////////
2) Put the yoke trunnions in the door holes.
3) Attach the hook on the bleed valve housing.
(b) Disengage the main flexible shaft.
(c) Turn the VBV control drive of the bleed valve and master
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