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////////////////////////A / PW4000 SERIES /747-400 / ENGINES /MAINTENANCE MANUAL ////////////////////////

L-L L-B2771
1st-Stage (Fan) Blade Leading and Trailing Edge Minimum Thickness Limits Figure 801 (Sheet 3)
H75195
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TRAILING
EDGE

MINIMUM DISTANCE BETWEEN BLEND REPAIRS ON OPPOSITE EDGES MUST NOT BE LESS THAN THE AVERAGE BLADE WIDTH
L-A0616 L-A2318
Minimum Distance Between Blend Repairs on 1st-Stage Blade Figure 802
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(P/N 52A121, 52A121-001, 53A321, 56A511 AND 56A821)
1.  
THE OUTER HALF OF THE BLADE - THE LENGTH OF A BLENDED AREA MUST BE 4 TIMES ITS DEPTH.

2.  
THE IMPORTANT AIRFOIL AREA - THE LENGTH OF A BLENDED AREA MUST BE 12 TIMES ITS DEPTH

4.  THE INNER HALF OF THE BLADE - THE LENGTH OF A BLENDED AREA MUST BE 6 TIMES ITS DEPTH.
5.  
300 INCHES (160.02 mm)

6.  
18.500 INCHES (469.9 mm)

7.  
22.500 INCHES (571.50 mm)

8.  THE LEADING EDGE AT THE PART SPAN SHROUD - THE LENGTH OF A BLENDED AREA MUST BE 12 TIMES ITS DEPTH.
1st-Stage (Fan) Blade Repair
Figure 803 (Sheet 1)

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2

3
7

6

(P/N 54A821, 56A621)
1.  
THE OUTER HALF OF THE BLADE - THE LENGTH OF A BLENDED AREA MUST BE 4 TIMES ITS DEPTH.

2.  
THE IMPORTANT AIRFOIL AREA - THE LENGTH OF A BLENDED AREA MUST BE 12 TIMES ITS DEPTH

4.  THE INNER HALF OF THE BLADE - THE LENGTH OF A BLENDED AREA MUST BE 6 TIMES ITS DEPTH.
5.  
6.300 INCHES (160.02 mm)

6.  
18.500 INCHES (469.9 mm)

7.  
22.850 INCHES (580.390 mm)

8.  
THE LEADING EDGE AT THE PART SPAN SHROUD - THE LENGTH OF A BLENDED AREA MUST BE 12 TIMES ITS DEPTH.

1st-Stage (Fan) Blade Repair Figure 803 (Sheet 2)
H75208
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AREA D (VERY IMPORTANT)
(P/N 53A321, 56A511 AND 56A821)
L-B2954 (0896)
Airfoil Damage Limits Figure 804 (Sheet 1)
H75213
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AREA B (VERY IMPORTANT) (4 LOCATIONS)
AREA C
TRAILING
1.00 INCH

(25.40 mm)
(P/N 54A821, 56A621)
L-B2955 (0896)
Airfoil Damage Limits Figure 804 (Sheet 2)
　
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