S 216-006-N00
(8)
Examine the support bracket of the actuator for damage, cracks, or a loose support bracket.
(a)
If there is damage, replace the support bracket.
(b)
If there are loose support bracket connections to the high pressure compressor (HPC) case, tighten or replace the mounting bolts and nuts as it is necessary.
E.
Do an Inspection of the Variable Stator Vane Actuating System for Continued In-Service Limits.
(1)
Do the inspection steps that follow:
S 216-020-N00
NOTE: The variable vane actuating system can be continued in
____ service for a maximum of 250 hours. This is when the wear on the parts of the system are more than the specified wear/looseness limits.
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UNISON RING 7TH-STAGE 6TH-STAGE UNISON RING UNISON RING 5TH-STAGE RING INLET GUIDE VANE UNISON
SEE A
USE THE CROWSFOOT AND THE WRENCH HERE
(3 LOCATIONS) PWA 86331 RIG PIN
BELLCRANK SUPPORT
BELLCRANK ARM BELLCRANK RIGGING HOLE
RIG PIN PWA 86332 RIGGING PIN BELLCRANK 1 2 A VARIABLE STATOR VANE ACTUATOR
2 1 ENGINES WITH PW SB 72-246, USE PWA 86334 RIG PIN ENGINES WITHOUT PW SB 72-246, USE PWA 86333 RIG PIN
Compressor Stator Vane Control
Figure 602
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////////////////////////A / PW4000 SERIES /747-400 / ENGINES /MAINTENANCE MANUAL ////////////////////////
7TH-STAGE UNISON RING UNISON RING 6TH-STAGE 5TH-STAGE UNISON RING VANE UNISON INLET GUIDE RING
SEE A
SEE B SUPPORT
BELLCRANK ARM
BELLCRANK
RIGGING HOLE
SEE C VANE ACTUATOR VARIABLE STATOR
COMPRESSOR STATOR LEVER SET A
B
Compressor Stator Vane Lever Set and Support
Figure 603 (Sheet 1)
C18830
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VARIABLE STATOR VANE ACTUATOR
FLANGE
RIGHT SIDE VIEW OF ACTUATOR AND SUPPORT
CLEVIS ATTACHMENT OF LEVER SET
CONNECTING RODS TO UNISON RING
Compressor Stator Vane Lever Set and Support
Figure 603 (Sheet 2)
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C18835
////////////////////////A / PW4000 SERIES /747-400 / ENGINES /MAINTENANCE MANUAL ////////////////////////
COMPRESSOR STATOR LEVER SET
AND ACTUATOR
A-A
Compressor Stator Vane Lever Set and Support
Figure 603 (Sheet 3)
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C18840
~............................................................................... | CONTINUE-IN-SERVICE INSPECTION | ................................................................................. | | | | | EXAMINE | DAMAGE LIMITS | DISPOSITION | .................................................................................
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