INSPECTION-ACCEPTANCE/REJECTION CRITERIA FOR SRU-37/P.
LRU-18/U Life Raft Function Test.
This task covers: Test
3/8-or 1/2-Inch Diameter Rubber
Hose 157E24-2201 (D15)
(or Shop Air Vac)
Life Raft Removed From Container Assembly
Functional Test. To functionally test the LRU-18/U
life raft assembly, proceed as follows:
For life raft inflation, ensure that there
is adequate area free of foreign objects.
A functional test shall be performed
every third 120 ± 10 day inspection
accomplished with the cylinder attached
to the life raft. Cylinder and valves will
remain with the same life raft until the
life raft is functionally tested, or
inspection reveals the cylinder and
valve to be unserviceable. This is to
ensure that the cylinder and valve
Open life raft container assembly, unfold life
raft, and lay it flat.
Measure time of inflation; life raft shall inflate to
design shape without evidence of restriction in
less than 30 seconds.
Actuate inflation assembly.
If raft does not properly inflate, determine
cause. (See Table 4-2.)
Examine life raft for obvious defects such as
To prevent burns, personnel removing C02
cylinders should wear gloves (D25).
If no obvious defects are found, remove the
C02 inflation valve assembly.
Ensure that the check valve assembly is clean,
free from foreign matter and not damaged. If
check valve assembly is damaged, replace in
accordance with paragraph 4.8.5.
Repair inflation valve assembly in accordance
with paragraph 4.8.4.
If repairs are made, recheck in accordance
with steps b and c.
Deflate life raft. Ensure that all carbon dioxide
has been removed.
DEFLATION. To deflate the LRU-18/U life raft,
proceed as follows:
Attach one end of rubber hose (D15) to vacuum
Unlock applicable oral inflation valve, hold in
open position, and hold vacuum pump hose
against end of inflation valve. When cell is
collapsed, release oral inflation valve and
screw lock closed.
The vacuum source hose should be held at
an angle to the inflation valve or air will not
properly evacuate the cell.
END OF TASK