TM 1-1520-238-23
5-15
5.2.
MAIN ROTOR BLADE REPAIR CRITERIA continued
M04-2118-2
NOTES:
1.
ALL DIMENSIONS ARE IN INCHES.
2.
USE STRAIGHT EDGE AND DEPTH GAGE. NO VISIBLE DENT SHALL EXIST DURING STRAIGHT EDGE TEST.
STRAIGHT EDGE SHALL ROCK SMOOTHLY WITHOUT JARRING OR CLICKING ON ALL CURVED SURFACES.
3.
INSPECT FOR VOIDED (GAPPED) BOND LINES.
4.
INSPECT FOR VOIDED (GAPPED) BOND LINES AND DE-ICING BLANKET ELECTRICAL CONTINUITY.
5.
REPAIRS APPLY TO BOTH UPPER AND LOWER SURFACES.
AREA
MAXIMUM DEPTH
WITHOUT
REPAIR
REPAIR
PARAGRAPHS
TABLE 5-2. DENTS, DEPRESSIONS, AND CREASES.
MAXIMUM
REPAIRABLE
DEPTH
MAXIMUM
ALLOWED
AREA
MAXIMUM
NUMBER OF
DEFECTS
MINIMUM DISTANCE
BETWEEN DEFECT
CENTERS
UPPER SURFACE
0.008
LOWER SURFACE
0.009
UPPER SURFACE
0.010
LOWER SURFACE
0.017
UPPER SURFACE
0.015
LOWER SURFACE
0.017
.020
0.010
3
3
0.015
4
0.025
4
0.030
4
0.030
0.50 x 0.50
1.25 x 1.25
1.5 x 1.5
1.5 x 1.5
3
3
3
3
3
SEE TABLE 5-4
10.0
10.0
10.0
18.0
6.0
5.5
5.5
5.5
5.5
5.5
0.75
2.0
0.025
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