S 865-012-C00
(5) Operate the VBV system to the full open position (AMM 75-32-00/201).
(a)
Attach a pull scale to the rod end bearing.
(b)
Apply a tension load of 15-17 pounds (67-76 N) in a line with the cable centerline axis.
(c)
Keep the load while you push the MEC feedback arm away from the cable attachment bracket.
(d)
Do a check for clearance between the centerline of the rod end bearing of the cable and the centerline of the cable attachment hole of the MEC feedback arm.
(e)
If there is no clearance, make the cable shorter.
NOTE: To do this, loosen the jamnut and turn the rod end
____
bearing.
(f) Do a check that the threads are engaged sufficiently.
NOTE: To do this, make sure a 0.032 inch (0.80 mm) diameter
____ lockwire does not go through the witness hole.
1) If the threads are not correctly engaged, adjust the cable length.
NOTE: To do this, turn the rod end bearing.
____
2) If the threads are not correctly engaged, do the steps to do the clearance check of the MEC feedback arm in the above steps.
(g)
If an adjustment of the rod end bearing was necessary, do the step that follows: 1) Tighten the jamnut against the rod end bearing to
60-70 pound-inches (6.8-7.9 Newton meters).
(h)
Attach the rod end bearing to the MEC feedback arm. 1) Align the rod end bearing with the MEC feedback arm and
install the pin. 2) Install the retainer clip and the fillister head screw. 3) Tighten the screw to 24-27 pound-inches
(2.7-3.1 Newton meters).
H. Do the Static Rig Check (Fig. 504)
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CFM56 ENGINES
737-300/400/500/ /MAINTENANCE MANUAL ////////////////////////
SEE A
APPLY TENSION SEE B
PULL SCALE
SEE LOCKWIRE C ALIGNMENT BAR TO THE MEC FEEDBACK ARM
RIG NOTCH MEC LOCKING BOLT CABLE ADJUSTMENT BRACKET ADJUSTMENT SCREW
A
CABLE G-M56-MM-0168(1)-00-B ATTACHMENT BRACKET
CLOSED VBV POSITION
B
Variable Bleed Valve (VBV) Feedback Cable Static Rig Check Figure 504 (Sheet 1)
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CFM56 ENGINES
737-300/400/500/ /MAINTENANCE MANUAL ////////////////////////
RIG NOTCH
CORRECT RIG: VBV'S IN THE FULLY CLOSED POSITION WITH THE CORRECT CABLE RIG. ALIGNMENT BAR
RIG NOTCH
INCORRECT RIG: VBV'S IN THE FULLY CLOSED POSITION WITH THE CABLE NOT RIGGED CORRECTLY (THIS MISADJUSTMENT WILL CAUSE THE VBV'S TO TRACK ON THE OPEN SIDE OF THE VBV SCHEDULE).
ALIGNMENT BAR
RIG NOTCH
INCORRECT RIG: VBV'S IN THE FULLY CLOSED POSITION WITH THE CABLE NOT RIGGED CORRECTLY (THIS MISADJUSTMENT WILL CAUSE THE VBV'S TO TRACK ON THE CLOSED SIDE OF THE VBV SCHEDULE).
ALIGNMENT BAR G-M56-MM-0184(1)-00-B
Variable Bleed Valve (VBV) Feedback Cable Static Rig Check Figure 504 (Sheet 2)
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BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
////////////////////////A / /
CFM56 ENGINES
737-300/400/500/ /MAINTENANCE MANUAL ////////////////////////
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