MIL-STD-2199A APPENDIX B
B.3.1.2.2.3 Repair of damaged areas not in way of sleeve ends. If the GRP contains damaged areas which likewise produced a spark during the spark test (not in way of the sleeve end(s)), repair as follows:
a. Remove a band of GRP from around the entire circumference of the shaft, in way of each damaged area, until fully bonded GRP and clean shaft metal is reached. A disc sander, Dremel tool (or equal), or suitable abrasive cutting tool may be used to score the GRP. The fiberglass cover in the damaged or defective area is to be removed with a disc sander after being scored. Exercise extreme caution not to damage the underlying shaft surface when removing the GRP.
b. Bevel the edges of the GRP on both sides of each defective area 1 to 2 inches.
c. Remove all remaining elastomeric coating as well as the primer layer in way of each band of removed GRP utilizing a disc sander, flapper wheel, and/or wire brush. However, exercise extreme caution not to damage the underlying shaft surface.
d. Examine the exposed shaft steel for damage/deterioration as outlined in the applicable shafting TRS or MS
and/or S9086-HM-STM-010/243 and repair accordingly. e. Accomplish steps B.3.1.2.2.2.d and e.
f. After the primer dries (approximately 30 minutes), apply both the first and second coats of the elastomeric coating over each newly primed area (see A.3.2.2). Be sure to blend the second coat onto the beveled edges of the GRP.
NOTE: A small quantity of Parts A and B for each coat shall be mixed in the proper ratio and applied to the area(s)
with a paint brush.
g. Accomplish steps B.3.1.2.2.2.h through k.
B.3.1.2.2.4 Repair of damaged areas in way of sleeve ends. If the GRP covering contains damaged areas, specifically in way of the sleeve end(s), which likewise produced a spark during the spark test - OR - exhibits evidence of seawater penetration at the GRP-to-shaft sleeve interface(s), repair as follows:
a. Remove a band of GRP from around the entire circumference of the shaft, in way of each damaged sleeve end, beginning at the GRP-to-shaft sleeve interface and extending axially a minimum of 6 inches past the shaft-to- sleeve interface or until fully bonded GRP/clean shaft metal is reached. A disc sander, Dremel tool (or equal), or chisel may be used to score the GRP covering in way of the shaft. However, exercise extreme caution not to damage the underlying shaft surface.
b. Bevel the edge(s) of the GRP 1 to 2 inches.
c. Remove all remaining sealing/fairing compound used to contour the sleeve end with the shaft. Utilize a chisel or screwdriver to score the compound and peel away from the sleeve end. However, exercise extreme caution not to damage the underlying shaft surface.
d. Also remove both the elastomeric coating and the primer layer from each band of removed GRP utilizing a disc sander, flapper wheel, and/or wire brush. However, exercise extreme caution not to damage the underlying shaft surface.
e. Examine the shaft-to-sleeve interface(s) as well as the exposed shaft steel surface(s) for damage/deterioration as outlined in the applicable shafting TRS or MS and S9086-HM-STM-010/243 and repair accordingly.
f. Accomplish steps B.3.1.2.2.2.d and e.
g. After the primer dries (approximately 30 minutes), apply both the first and second coats of the elastomeric coating over each newly primed area and the sleeve end prep area(s) (see A.3.2.2). Be sure to blend the second coat onto the beveled edges of the GRP as well.
NOTE: A small quantity of Parts A and B for each coat shall be mixed in the proper ratio and applied to the area(s)
with a paint brush.
h. After the elastomeric coating is tack free (approximately 2 hours), apply sealing/fairing compound to contour the sleeve end to the shaft in accordance with A.2.2.3.
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