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72-31-02
ALL ú ú N01 Page 612 ú Jun 15/98
BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
TASK 72-31-02-206-045-N00
5. 1st-Stage Fan Blade Platform Inspection for Damage (Fig. 606)
__________________________________________________
A. General
(1)
This inspection is done when you think there is foreign object damage (FOD).
B.
Equipment
(1)
Protective mat - Rubber Manufacturer's
Association, Grade SC43, neoprene sponge, 1
inch thick, approximately 5x6 feet with warning
streamers attached (3 are necessary).
C.
Access
(1)
Location Zone
412 Engine 1 - LPC Hub
422 Engine 2 - LPC Hub
432 Engine 3 - LPC Hub
442 Engine 4 - LPC Hub
D.
Procedure
S 866-046-N00
CAUTION:_______MAKE SURE YOU USE A PROTECTIVE MAT. IF YOU DO NOT, DAMAGE MAY RESULT TO THE INNER SURFACE OF THE INLET COWL.
(1) Put the protective mat on the inner surface of the inlet cowl.
S 216-047-N00
WARNING: TO PREVENT INJURY TO YOUR HANDS, GLOVES SHOULD BE WORN WHEN YOU
_______
HANDLE THE BLADES.
(2)
Examine the platform surfaces for nicks, dents, and scratches (Fig. 606, and Table 602).
(a)
Use 10X magnification.
(b)
Repair the blades that have damage (AMM 72-31-02/801).
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////////////////////////A / PW4000 SERIES /747-400 / ENGINES/MAINTENANCE MANUAL ////////////////////////
~...............................................................................
| | MAXIMUM DEPTH OF DAMAGE ON THE PLATFORM |
| .........................................................
| EXAMINE THESE AREAS | PERMITTED WITHOUT REPAIRS | PERMITTED IF REPAIRED |
................................................................................. | Dimension 1 | 0.300 Inch | | | (For Reference) | (7.620 mm) minimum | | ................................................................................. | Area A | 0.005 Inch | 0.020 inch | | Platform Surface | (0.127 mm) | (0.508 mm) | ................................................................................. | Area B | 0.005 Inch | 0.040 inch | | Root Face | (0.127 mm) | (1.016 mm) | 2.......................…...........................…...........................1
Platform Inspection Limits Table 602
S 216-048-N00
(3)
Examine the platform for cracks.
(a)
Remove fan blades that have cracks in the platform, because cracks are not permitted in the platform and you cannot repair cracks.
S 866-060-N00
(4) If you are done with the fan blade inspections, remove the protective mat from the inlet cowl.
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72-31-02
ALL ú ú N01 Page 614 ú Jun 18/00
BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
TASK 72-31-02-206-049-N00
6. 1st-Stage Fan Blade Root Inspection for Damage (Fig. 607)
______________________________________________
A. General
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本文链接地址：747-400 AMM 飞机维护手册 发动机 ENGINE 1(154)
