S 866-007-C00
(6)
For the applicable engine: Remove the DO-NOT-CLOSE tag and close this circuit breaker:
(a) P6 Load Control Center
1) START VALVE ENG 1
2) START VALVE ENG 2
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BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
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CFM56 ENGINES
737-300/400/500/ /MAINTENANCE MANUAL ////////////////////////
TASK 72-31-02-206-008-C00
3. Fan Rotor Blades and First-Stage Disk Inspection (With Blades Removed)______________________________________________________________________
A. Equipment
(1)
Inspection Mirror - Fan Disk Dovetail Slot,
856A5649,
CFM International, P.O. Box 15514,
Cincinnati, OH 45215
(2)
Protective mats (quantity 2) -Rubber Manufacturer's Association Grade SC43,
neoprene sponge, 1 inch thick, approximately
3 x 4 feet with warning streamer attached
(3)
Inspection Tool - Fan Blade Mid-Span Shroud
856A3629,
CFM International, P.O. Box 15514,
Cincinnati, OH 45215
(4)
Inspection Tool - Fan Disk Dovetail Pressure
Face
856A6629,
CFM International, P.O. Box 15514,
Cincinnati, OH 45215
B. References
(1)
AMM 70-40-01/201, Fluorescent Penetrant Inspection
(2)
AMM 72-31-01/401, Spinner
(3)
AMM 72-31-02/401, Fan Rotor Blades
C. Access
(1) Location Zones
506 Engine No. 1 - Fan Rotor
606 Engine No. 2 - Fan Fotor
D. Examine the Fan Rotor Blades and First-Stage Disk
S 866-009-C00
(1) For the applicable engine:
open this circuit breaker and attach a DO-NOT-CLOSE tag:
(a) P6 Load Control Center
1) START VALVE ENG 1
2) START VALVE ENG 2
S 496-010-C00
CAUTION:_______MAKE SURE YOU INSTALL THE MATS IN THE INLET COWL. THIS WILL PREVENT DAMAGE FROM TOOLS, PARTS OR UNWANTED MATERIAL THAT FALL ON THE INLET COWL.
(2)
Install the mats into the lower half of the inlet cowl.
(3)
Remove the spinner front and rear cones (AMM 72-31-01/401).
S 016-011-C00
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BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
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CFM56 ENGINES
737-300/400/500/ /MAINTENANCE MANUAL ////////////////////////
S 016-012-C00
(4)
Remove the fan rotor blades (AMM 72-31-02/401). S 226-013-C00
(5)
Examine the areas of the fan blades for the conditions follow: NOTE: The leading and trailing edges are the most forward and aft
____
edges of the airfoils from the tip to the platform.
(a) Dovetail:
1) Molydag coating on the pressure face:
a) 100% of molydag coating missing is permitted on the pressure face contact area.
NOTE: A 1500 to 3000 cycle maximum service
____ extension is permitted. The blade must be cleaned before the inspection and then relubricated with CFMI recommended product before the installation for extension.
NOTE: Repeated extensions are permitted if
____ dovetail is cleaned, examined and then lubricated before the blade installation.
NOTE: Typical appearance of the molydag coating is
____ bright dark grey.
NOTE: Typical appearance of unaffected Cu Ni
____ Indium coating (no wear) associated with molydag coating missing is light grey coloure.
2) Cu Ni Indium coating on the pressure face:
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