TM 55-1520-240-23-3
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REPAIR EXHAUST CONE (AVIM)
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INITIAL SETUP
Applicable Configurations:
All
Tools:
Inert Gas Welding Set, NSN 3431-00-079-0498
Airframe Repairer’s Tool Kit, NSN 5180-00-323-4876
Fluorescent Penetrant Method
Materials:
Alloy Sheet (Inconel), 0.025 Inch Thick (E202)
Welding Rods AMS5679 (E444)
Personnel Required:
Welder
Inspector
References:
MIL-W-8611
TM 1-1500-204-23
TM 1-1520-253-23
Equipment Condition:
Off Helicopter Task
NOTE
If a crack is suspected in the
exhaust cone or stiffener, refer to TM
1-1520-253-23.
1.
Repair holes (1) in cone (2) by welding patches
of alloy sheet (E202) (MIL-W-8611). Use welding
rods (E444). Repair limits are as follows:
a.
Limit of 2 inch hole diameter.
b.
Limit of three holes per cone.
c.
Limit of 9 square-inches of patching per
cone.
d.
Minimum of 6 inches between holes.
INSPECT
2.
Repair cracks (3) in cone (2) by welding. Use
welding rod (E444). Repair limits are as follows:
a.
Limit of 8 inches crack length.
b.
Limit of 1/8 inch crack width.
c.
Limit of 16 inches of crack repair.
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