72-31-04
 ALL  ú ú N01 Page 802 ú Jun 18/00
BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
A
A
INLET CONE
AT THE  1ST-STAGE 
MAXIMUM  FAN BLADE 
DEPTH 
1ST-STAGE STATOR 
SEE  A 
FAN EXIT FAIRING 
REPAIR BLEND ON OPPOSITE EDGES BETWEEN BLEND REPAIRS MINIMUM DISTANCE  A-A  L-A0909 
MUST NOT BE LESS THAN 
AVERAGE  THE AVERAGE VANE WIDTH 
VANE WIDTH 

SEE BL-A0616
MINIMUM DISTANCE BETWEEN BLEND REPAIRS
AREAS A AND B
AREAS C AND D
AREA E BOTH SIDES
B-B
AREA C AREA A
B
AREAS A AND B
B
AREA D 1/3 TRAILING THE BLEND EDGE LENGTH REPAIR MUSTAREA B BE TO THE FULL RADIUS1/3 LEADING EDGE LENGTH
A
B L-A3497
1st-Stage Stator Blend Limits Figure 801
EFFECTIVITYùùùùùùùùùùùùùùùùùùùùùùùùùùùùùù. ú

 72-31-04
 ALL  ú ú N01 Page 803 ú Jun 10/91
BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
////////////////////////A / PW4000 SERIES /747-400 / ENGINES/MAINTENANCE MANUAL ////////////////////////
S 328-002-N00
 (2)  Refer to Table 801 for the limits for the Blended 1st-stage Stator Vanes.
 NOTE: These limits are for blended areas on the vanes, and not for
____
 damage that is not blended.

 ~................................................
 | LIMITS FOR THE BLENDED 1ST-STAGE STATOR VANES |
 ..................................................
 | VANE AREA | LIMIT |
 ..................................................
 | A | 0.100 inch (2.540 mm) |
 ..................................................
 | B | 0.090 inch (2.286 mm) |
 ..................................................
 | C | 0.100 inch (2.540 mm) |
 ..................................................
 | D | 0.090 inch (2.286 mm) |
 ..................................................
 | E | 25 percent of the local thickness |
 2...........…....................................1

 1st-Stage Stator Blend Limits Table 801
 S 328-004-N00
 (3)  
Refer to the limits that follow when you blend the damage on the 1st-stage stator vanes.

 (a)  
Blended areas on the concave airfoil surface can be on no more than 20 percent of the surface area. 1) Rounded bottom dents are permitted.

 (b)  
Blended areas on the convex airfoil surface can be on no more than 5 percent of the surface area.

 (c)  
The sum of the lengths of all blended areas on the two edges of a vane must not be more than 0.500 inch (12.700 mm).

 (d)  
No more than two blended areas at the maximum depth limit are permitted on each vane.

 (e)  
Areas that are blended must have a radial length that is not less than times the depth.

 (f)  
The limits that follow are for blended areas that are at the maximum depth on opposite edges of the vane. 1) A blended area must not be immediately opposite the other

 blended area.
 EFFECTIVITYùùùùùùùùùùùùùùùùùùùùùùùùùùùùùù. ú

 72-31-04
 ALL  ú ú N01 Page 804 ú Jun 18/00
BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
2)  One blended area must not be less than the average vane width from the other blended area.
 (g)  
The limit that follows is for blended areas that are not at the maximum depth, are on opposite edges, and one is nearer than the average vane width to the other. 1) The sum of the depths of the two blended areas must not be

 more than the maximum depth for one blended nick.

 (h)  
The sum of the lengths of all edge blended areas in the vane and shroud assembly must not be more than 6.000 inches
　
中國航空網 m.k6050.com
航空翻譯 www.aviation.cn
本文鏈接地址：747-400 AMM 飛機維護手冊 發動機 ENGINE 1(178)