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BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
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////////////////////////A / PW4000 SERIES /747-400 / ENGINES/MAINTENANCE MANUAL ////////////////////////
(b)  To form the blade leading edge radius, use the tools that follow for the applicable blades:
 NOTE: Hand held scraping tools, files and abrasive paper or
____ cloth can be used but material removal must be uniform along the leading edge.
 1) For PN 52A121 blade, use PWA 75432 Cutter. 2) For PN 56A621 or 56A821 blades over zone J only, use PWA 86054 Handle with PWA 86055 Edge Scraper Insert. 3) For PN 56A621 or 56A821 blades over zone K only, use PWA 86054 Handle with PWA 101157 Edge Scraper Insert.
 (c)  Do not remove more material than necessary and limit removal to
 0.100 inch (2.54 mm) maximum.
 NOTE: A tapered cut, starting at the tip and extending to the
____
 blade root fillet is optional.

 S 228-027-N00
 (11)
 FOR PN 52A121 AND 56A821 BLADES; If necessary, after material has been removed, use the optional PWA 49065 Template to check the blade chord length.

 (a)  
The minimum blade chord length at each section of the blade, as specified in Figure 810 or 811 as applicable, must be maintained.

 S 358-028-N00
 (12)
 Polish the repair area to remove the scratches and machine marks (AMM 70-42-07/201).

 S 328-029-N00

 (13)
 Blend repair the blade airfoil area as necessary (AMM 72-31-02/801).

 S 648-041-N00
 WARNING:_______DO NOT PERMIT THE LUBRICANT TO TOUCH YOUR SKIN. IF IT DOES, WASH IMMEDIATELY WITH SOAP AND WATER.
 (14)
 With a brush, apply lubricant (D00651) to the blade root area.

 (a)  
There is no cure requirement.

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BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
28

(PN 52A121, 52A121-001, AND 56A821)

L-A4430
Minimum Fan Blade Chord Length (P/N 52A121, 52A121-001, and 56A821) Figure 810 (Sheet 1)
H18996
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BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
////////////////////////A / PW4000 SERIES /747-400 / ENGINES /MAINTENANCE MANUAL ////////////////////////
INDEX  DIMENSION FROM PLANE Z  MINIMUM CHORD DIMENSION (PN 52A121 AND 52A121-001 BLADE)  MINIMUM CHORD DIMENSION (PN 56A821 BLADE) 
1  4.009 (101.829)  6.999 (177.775)  6.900 (175.260) 
2  4.669 (118.593)  7.013 (178.130)  6.914 (175.616) 
3  5.669 (143.993)  7.028 (178.511)  6.929 (175.997) 
4  6.669 (169.393)  7.080 (179.832)  6.979 (177.267) 
5  7.669 (194.793)  7.159 (181.839)  7.057 (179.248) 
6  8.669 (220.193)  7.233 (183.718)  7.131 (181.127) 
7  9.669 (245.593)  7.296 (185.318)  7.194 (182.728) 
8  10.669 (270.993)  7.367 (187.122)  7.267 (184.582) 
9  11.669 (296.393)  7.455 (189.357)  7.351 (186.715) 
10  12.669 (321.793)  7.555 (191.897)  7.446 (189.128) 
11  13.669 (347.193)  7.657 (194.488)  7.549 (191.745) 
12  14.669 (372.593)  7.746 (196.748)  7.643 (194.132) 
13  15.669 (397.993)  7.836 (199.034)  7.735 (196.469) 
14  16.669 (423.393)  7.933 (201.498)  7.831 (198.907) 
15  17.669 (448.793)  8.028 (203.911)  7.928 (201.371) 
16  18.669 (474.193)  8.124 (206.350)  8.025 (203.835) 
17  19.669 (499.593)  8.230 (209.042)  8.128 (206.451) 
18  20.289 (515.341)  8.297 (210.744)  8.195 (208.153) 
19  20.809 (528.549)  8.346 (211.988)  8.242 (209.347) 
　
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