B
E
D
D
FILLET
AREA
7TH-STAGE HPC BLADE
0.25 INCH
(6.35 mm)
C
TRAILING EDGE
0.25 INCH
(6.35 mm) D 0.25 INCH (6.35 mm)
D
E
A
C C
B TRAILING EDGE
LEADING EDGE
0.50 INCH
(12.70 mm)
B L-A2688-0994 E D
D D
FILLET AREA
0.50
INCH
1.65
INCH
(12.70 mm) (41.91 mm)
8TH-STAGE HPC BLADE
L-A2699
HPC Blade Continue-In-Service Limits
Figure 612 (Sheet 2)
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0.25 INCH (6.35 mm) D 0.25 INCH (6.35 mm)
D
A
C C
EDGE LEADING B EDGE TRAILING
0.25 INCH (6.35 mm) 0.25 INCH (6.35 mm)
AREA D FILLET D 0.50 INCH (12.70 mm) 0.25 INCH (6.35 mm) C C C A C 0.25 INCH (6.35 mm)
9TH- THRU 12TH-STAGE HPC BLADE L-A2698 EDGE LEADING B EDGE TRAILING
D D
FILLET AREA
0.38 INCH
(9.65 mm)
L-A2691
13TH- THRU 15TH-STAGE HPC BLADE
HPC Blade Continue-In-Service Limits Figure 612 (Sheet 3)
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////////////////////////A / PW4000 SERIES /747-400 / ENGINES/MAINTENANCE MANUAL ////////////////////////
No. 15 - HPC Vane and Blade (5th- through 15th-Stage) Inspection
________________________________________________________________
2) Refer to Tables 602 thru 604 for the continue-in-service limits for the HPC 5th- thru 15th-stage blades (Fig. 612). NOTE: You can blend the leading edges of the blades
____ that are damaged in the 5th, 6th, and 7th stage of the HPC (AMM 72-35-02/801).
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No. 15 - HPC Vane and Blade (5th- through 15th-Stage) Inspection
________________________________________________________________
~..................................................................... | TABLE 602 | ....................................................................... | HPC 5th- thru 8th-Stage Blade Continue-In-Service Limits | ....................................................................... | BLADE AREA | CONTINUE-IN-SERVICE LIMITS | NOTES | ....................................................................... | Airfoil |Airfoil discoloration and |Discoloration or shiny | | Surfaced |shiny surfaces are |surfaces are not cause | | Both Sides |permitted. |for engine removal. | ....................................................................... | A |Not more than 0.25 inch |Nicks and dents near the | | |(6.35 mm) of a corner can be |leading and trailing edge |
| |fully broken off. Curled, |corners do not change the |
| |different shape, or impact |engine performance much. |
| |damaged material is | |
| |permitted. | |
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