CABLE CABLE
ATTACHMENT ATTACHMENT
BRACKET BRACKET
G-M56-MM-0080(1)-02-B
CLOSED VBV POSITION OPEN VBV POSITION C
Variable Bleed Valve (VBV) Feedback Cable Travel Check Figure 503
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CFM56 ENGINES
737-300/400/500/ /MAINTENANCE MANUAL ////////////////////////
SEE A
SEE  B 
A  ROD END  SEE  C
FEEDBACK REVERSER ARM 
B 

Variable Bleed Valve (VBV) in the Fully Closed Position
Figure 503A (Sheet 1)

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E16955
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CFM56 ENGINES
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FEEDBACK ROD

FREE LEVER ARM

S-M56-MM-0316-00-B
Variable Bleed Valve (VBV) in the Fully Closed Position Figure 503A (Sheet 2)
E17547
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2)  Turn the clevis on the threaded end.
 (f)  Do a check that the threads are sufficiently engaged.
 NOTE: To do this, make sure a 0.032 inch (0.8 mm) diameter
____ lockwire does not go through the witness hole.
 1)  If the threads are not correctly engaged, adjust the cable length. a) Loosen the jamnut. b) Turn the clevis on the threaded end until the lockwire
 will not go through the witness hole.
 (g)  
If an adjustment of the clevis end was necessary, do the step that follows: 1) Tighten the jamnut against the clevis end to

 60-70 pound-inches (6.8-7.9 Newton meters).

 (h)  
Attach the clevis end to the reverser arm.
 1) Put the clevis end on the reverser arm.
 2) Lightly lubricate the bolt threads with grease.

 CAUTION: PUT THE BOLT HEAD ON THE REVERSER ARM IN THE POSITION
_______ SHOWN IN FIG. 501 (VIEW E). IF IT IS NOT IN THIS POSITION, DAMAGE CAN BE CAUSED.
 3)  Install the bolt, washer and slotted nut.
 4)  Tighten the nut to 50-55 pound-inches (5.7-6.2 Newton meters) while you align the nut slot with the cotter pin hole.
 NOTE: Replace the nut if you cannot get the minimum torque
____ value, or if you get more than the maximum torque value.
 5)  Install the cotter pin.
 NOTE: When you do this, bend the ends around the nut
____
 flats.

 S 215-011-C00
 (4)  Do a check of the cable length at the MEC end.
 (a)  
Make sure the VBV system is in the full closed position.

 (b)  
Attach a pull scale to the rod end bearing at the MEC end.

 NOTE: Use a lockwire.
____
 (c)  
Apply a tension load of 15-17 pounds (67-76 N) in a line with the cable centerline axis.

 (d)  
Keep the load while you push the MEC feedback arm to the cable attachment bracket.

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