E. Prepare for the VBV Feedback Cable Adjustment (Fig. 501)
S 015-002-C00
(1)
Open the left thrust reverser half (AMM 78-31-00/201).
S 035-003-C00
(2)
If it is connected, disconnect the end of the VBV feedback cable from the MEC feedback arm as follows:
(a)
Remove the Allen head bolt and retainer clip from the MEC feedback arm.
(b)
Remove the pin to release the rod end bearing from the feedback arm.
S 035-004-C00
(3) If it is connected, disconnect the end of the VBV feedback cable from the reverser arm on the stop mechanism of the bleed valve as follows:
(a)
Remove and discard the cotter pin from the nut.
(b)
Remove the nut and washer.
(c)
Remove the bolt to release the clevis end from the reverser arm.
F. Do the Resistance Check (Fig. 502)
S 435-005-C00
(1) With the feedback cable fully extended at the stop mechanism end, attach a pull scale to the rod end bearing at the MEC end.
NOTE: Use a lockwire.
____
(a) Do a pull check.
NOTE: To do this, apply a force in a straight line (less than
____ 4 degrees from the cable centerline axis). Increase the force at a slow rate. Measure the force necessary to move the cable.
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CFM56 ENGINES
737-300/400/500/ /MAINTENANCE MANUAL ////////////////////////
SEE C
SEE B
SEEA
A
SEE D
JAM NUT SEE E
MEC NOSE CAP
SLOTTED
BRACKET
NOSE CAP
FLATCONDUIT CAP WASHER
SLOTTED BRACKET
CONDUIT CAP
S-M56-MM-1014-(1)-01-B
B
JUNCTION PLATE
C S-M56-MM-1012-(1)-01-B
Variable Bleed Valve (VBV) Feedback Cable Clevis and Rod End Connections
Figure 501 (Sheet 1)
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CFM56 ENGINES
737-300/400/500/ /MAINTENANCE MANUAL ////////////////////////
Variable Bleed Valve (VBV) Feedback Cable Clevis and Rod End Connections
Figure 501 (Sheet 2)
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CFM56 ENGINES
737-300/400/500/ /MAINTENANCE MANUAL ////////////////////////
TENSION APPLY
PULL SCALE
SEE A LOCKWIRE ARM MEC FEEDBACK
BEARING ROD END
CABLE ATTACHMENT BRACKET
SEE B
VBV FEEDBACK CABLE
G-M56-MM-0080(1)-02-B
B
____NOTE: FORCE THAT IS NECESSARY TO MOVE
THE CABLE MUST NOT BE MORE THAN
MEC 6 POUNDS (27 N).
A END IS SHOWN, THE STOP MECHINISM THE RESISTANCE CHECK AT THE MEC
END IS SIMILAR. Variable Bleed Valve (VBV) Feedback Cable Resistance Check Figure 502
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CFM56 ENGINES
737-300/400/500/ /MAINTENANCE MANUAL ////////////////////////
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