1st-Stage Blade Fluorescent Penetrant Inspection Areas
Figure 608
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1ST-STAGE (FAN) BLADE - REPAIRS
_______________________________
1. General_______
A. This procedure gives the data for the tasks that follow:
(1)
The repair of the 1st-stage fan blades.
(2)
The replacement of the platform rubber seals.
(3)
The repair of the leading edge contour of the 1st-stage fan blades.
B.
You must go into the inlet cowl to get access to the 1st-stage fan blade.
TASK 72-31-02-308-001-N00
2. Blend Repair of the 1st-Stage Fan Blade_______________________________________
A. General
(1)
You will blend the edges and the surfaces of the 1st-stage fan blades to do the repair.
(a)
You can blend the blades with a file or an abrasive stone.
(b)
If you must remove a large quantity of material, you can blend with a power tool.
WARNING:_______ALWAYS WEAR GLOVES WHEN YOU TOUCH THE FAN BLADES. THESE BLADES HAVE SHARP EDGES THAT CAN CAUSE INJURY TO YOUR HANDS.
CAUTION: BE VERY CAREFUL WHEN YOU REPAIR THE DAMAGE IN THE INNER HALF OF
_______ THE BLADE. THE NICKS IN THE LEADING AND TRAILING EDGES BECOME MORE IMPORTANT AS THEY GET NEARER TO THE ROOT OF THE BLADE.
IF YOU USE A POWER TOOL TO REPAIR THE BLADE, MAKE SURE THE BLADE IS NOT TOO HOT. TOO MUCH HEAT CAN CAUSE THE BLADE TO BECOME WEAK AND CAUSE A FRACTURE. IF THE BLADE IS TOO HOT TO TOUCH WITH YOUR BARE HAND, LET THE SURFACE BECOME COOL BEFORE YOU CONTINUE.
(2) Obey these procedures when you repair the 1st-stage fan blade:
NOTE: Always use a sharp tool or a clean abrasive cloth to
____ prevent too much heat. Examine the tools frequently and replace them when it is necessary.
For the location of the blade areas, refer to the procedure (AMM 72-31-02/601).
(a) All the repairs on the blade surface must be smooth.
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////////////////////////A / PW4000 SERIES /747-400 / ENGINES /MAINTENANCE MANUAL ////////////////////////
D-D
L-A8005
1st-Stage (Fan) Blade Leading and Trailing Edge Minimum Thickness Limits Figure 801 (Sheet 1)
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0.032 INCH
(0.813 mm)
0.025 INCH
(0.635 mm)
E-E
0.086 INCH
(2.184 mm)
0.041 INCH
(1.041 mm)
F-F
0.040 INCH
(1.016 mm)
0.031 INCH
(0.787 mm)
G-G
0.020 INCH
(0.508 mm) FOR THE FULL
LENGTH OF THE BLADE
7.812-8.062 INCHES
(198.4-204.8 mm) 0.040 INCH
(1.016 mm)
(P/N 53A321, 56A511 AND 56A821) H-H
B
L-A8007
1st-Stage (Fan) Blade Leading and Trailing Edge Minimum Thickness Limits Figure 801 (Sheet 2)
A80001
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