4.8 REPAIR/REPLACE LRU-18/U COMPONENTS.
4.8.1 Cementing the LRU-18/U Life Raft.
This task covers: a. Inspect
INITIAL SET UP
General Safety Instruction
Do not use toluene near open flame, heat, or electrical
sparks. Avoid prolonged contact with skin or breathing of
fumes. Use only in well-ventilated area.
Replacement of easily removed assembly components
such as CO2 inflation valves is authorized in addition
to repair and replacement procedures documented in
this section. The life raft shall be subjected to a func-
tional and leakage test each time CO, inflation valves
are removed and replaced for any reason, and each
time inflation valve gaskets are replaced
1. Determination of Reparability. The LRU-18/U life
raft shall be considered beyond repair for any of the
2. Cementing the LRU-18/U Life Raft. Cementing of
the LRU-18/U life raft shall be performed as follows:
Porous fabric areas on tubes.
Split or open tube seams.
Leakage test failure resulting from other than
repairable cut, tear or puncture.
Holes, cuts, tears, or punctures within I inch of
Damaged, malfunctioning, or excessively
corroded inlet valve, manifold assembly, oral
inflation valves, or oral inflation tubes.
Holes or abrasions exceeding 1 inch in length or
diameter on tubes.
Oral inflation or inlet valve stem separating from
Deterioration of the nylon fabric caused by oil,
grease, or any other foreign substance.
Deterioration of the nylon fabric caused by an
excessive mildewed condition.
Patches exceed three.
Determination by an ALSE inspector that the life
raft requires excessive repair.
Place life raft on a clean, flat surface.
Ensure repair area is free of foreign objects.
Do not use Methyl Ethyl Ketone (MEK) to clean
the LRU-18/U life raft. MEK will break down
the polyurethane coating on the inside surface of
b. Clean both surfaces to be cemented with four
applications of toluene. Apply toluene (D20) with
back-and-forth strokes on the first and third
applications and one-way strokes on the second
and fourth applications. Allow areas to dry
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