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75-31-02
ALL ú ú C02.1 Page 507 ú Jul 12/02
BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
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CFM56 ENGINES
737-300/400/500/ /MAINTENANCE MANUAL ////////////////////////
ú (q) ENGINES POST-CFMI-SB 72-950;
ú Engines with this service bulletin do not use washers.
(r) Tighten the nose cap to 180-200 pound-inches
(20.3-22.6 Newton meters).
(s) Install some lockwire.
(t) Install the rod end bearing and the jamnut.
1) Turn the rod end bearing and the jamnut on the cable.
NOTE: Do this the same number of turns that were____
necessary to remove the bearing.
2) Do a check that the threads are sufficiently engaged.
NOTE: To do this, make sure a 0.032 inch (0.80 mm)____
diameter lockwire does not go through the witness
hole.
3) Tighten the jamnut against the rod end bearing to
24-27 pound-inches (2.7-3.1 Newton meters).
S 725-008-C00
(4) Do the pull check.
S 725-033-C00
(5) If the force is more than 8 pounds (36 N), replace the cable
(AMM 75-31-02/401).
G. Travel Check (Fig. 503)
S 865-009-C00
(1) Make sure the ends of the VSV feedback cable are disconnected from
the MEC feedback arm and the bellcrank lever arm.
S 035-037-C00
(2) Discard the cotter pin.
S 725-038-C00
CAUTION: IF YOU CHANGE THE ADJUSTMENT OF THE FEEDBACK CABLE LENGTH, YOU_______
MUST DO A VSV STATIC CHECK TO MAINTAIN PROPER ENGINE OPERATION.
(3) Do a check of the cable length at the bellcrank end
(AMM 75-31-00/201).
(a) Operate the VSV system to the full closed position.
(b) Pull the feedback cable at the bellcrank end until the travel
ú is stopped.
EFFECTIVITYùùùùùùùùùùùùùùùùùùùùùùùùùùùùùù. ú
75-31-02
ALL ú ú C01.1 Page 508 ú Jul 12/02
BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
////////////////////////A / /
CFM56 ENGINES
737-300/400/500/ /MAINTENANCE MANUAL ////////////////////////
SEE B SEE B
APPLY A FORCE OVERLAP
ACTUATOR VSV LEVER ARM BELLCRANK LEVER ARM BELLCRANK
GAP
CLOSED VSV POSITION
VSV ACTUATOR
NOTE: APPLY THE FORCE AT THE MEC END
OPEN VSV POSITION
A
Variable Stator Vane (VSV) Feedback Cable Travel Check
Figure 503 (Sheet 1)
EFFECTIVITYùùùùùùùùùùùùùùùùùùùùùùùùùùùùùù. ú
75-31-02
ALL ú ú C01 Page 509 ú Mar 15/96
BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
////////////////////////A / /
CFM56 ENGINES
737-300/400/500/ /MAINTENANCE MANUAL ////////////////////////
APPLY TENSION
G-M56-MM-0159(1)-00-B
Variable Stator Vane (VSV) Feedback Cable Travel Check Figure 503 (Sheet 2)
EFFECTIVITYùùùùùùùùùùùùùùùùùùùùùùùùùùùùùù. ú
75-31-02
ALL ú ú C01 Page 510 ú Mar 15/96
BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
////////////////////////A / /
CFM56 ENGINES
737-300/400/500/ /MAINTENANCE MANUAL ////////////////////////
(c) Do a check for overlap of the items that follow:
-
the centerline of the rod end bearing of the cable
-
the centerline of the attachment hole of the bellcrank lever
arm. 1) If there is no overlap, increase the length of the cable.
NOTE: To do this, loosen the jamnut and turn the rod end
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