S 432-008-C00
(8)
Connect the VSV head and rod end coupling nuts (tube to hose).
(a) Tighten the nuts to 135-150 pound-inches
(15.3-17.0 Newton meters).
S 412-021-C00
WARNING: OBEY THE INSTRUCTIONS IN THE PROCEDURE TO CLOSE THE THRUST
_______ REVERSERS. IF YOU DO NOT OBEY THE INSTRUCTIONS WHEN YOU CLOSE THE THRUST REVERSER, INJURIES TO PERSONS AND DAMAGE TO EQUIPMENT CAN OCCUR.
(9)
Close the left thrust reverser half (AMM 78-31-00/201).
S 412-022-C00
(10)
Close the left fan cowl panel half (AMM 71-11-02/201).
S 792-010-C00
(11)
Do a test of the engine with the Power Plant Test Reference Table, Test No. 3 (AMM 71-00-00/501).
S 792-011-C00
(12)
Examine for leaks at the VSV head and rod end coupling nuts (tube to hose) at the MEC.
TASK 75-31-00-732-012-C00
3. VSV System Actuation Procedure - Engine Motoring________________________________________________
A. References
(1) AMM 71-00-00/201, Power Plant
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(2)
AMM 71-11-02/201, Fan Cowl Panels
(3)
AMM 78-31-00/201, Thrust Reverser
B. Access
(1)
Location Zones
506 Engine No. 1 - Fan Frame
606 Engine No. 2 - Fan Frame
(2)
Access Panels
5738/5838 Thrust Reverser (LH)
C. Procedure (Fig. 202)
NOTE: An engine dry motor to operate the VSV system is not
____ recommended, and must only be done if the hydraulic cart is not available.
S 012-023-C00
(1) Open the left fan cowl panel half (AMM 71-11-02/201).
S 012-024-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 half (AMM 78-31-00/201).
S 032-014-C00
(3)
Disconnect the end of the VSV feedback cable from the MEC feedback arm.
(a)
Remove and discard the cotter pin from the nut.
(b)
Remove the nut, bolt and washer to release the rod end bearing from the feedback arm.
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CFM56 ENGINES
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SEE A
MEC FEEDBACK
ARM
APPLY A FORCE (IN OPEN DIRECTION)
MOTORING DRIVES VSV SYSTEM TO FULLY CLOSED POSITION
CABLE ATTACHMENT BRACKET
TO ACTUATE VSV SYSTEM
CLOSED BY MOTORING (VSV
ACTUATOR ROD EXTENDS)
C
SEE C
VSV FEEDBACK
CABLE
APPLY A FORCE
(IN CLOSED
DIRECTION)
MEC FEEDBACK ARM
MOTORING DRIVES VSV SYSTEM TO FULLY OPEN POSITION
CABLE
ATTACHMENT
BRACKET
TO ACTUATE VSV SYSTEM
OPEN BY MOTORING (VSV
ACTUATOR ROD RETRACTS)
SEE B
MEC
A
MEC FEEDBACK
ARM
WASHER BOLT
NUT ROD END BEARING TO THECOTTER FEEDBACKPIN CABLE
B
G-M56-MM-0159(1)-00-B
Variable Stator Vane (VSV) System Actuation - Engine Motoring
Figure 202
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