TM 1-4220-250-12&P
4.7.2
LRU-1 8/U Leakage Test.
This task covers:
a. Test
b. Remove
c. Install
INITIAL SET UP
Equipment Conditions
Tools
Test fixture (see Figure E-2).
Life Raft Removed From Container Assembly
Personnel
Materials/Parts
(see Figure 4-2 and Table 4-1).
2 (ASI-Q2)
C02 Cylinder
MIL-C-52053TC
1.
Leakage Test. The LRU-18/U shall be subjected to
a leakage test each Initial/120± 10 day inspection.
NOTE
Leakage Test cannot be performed with
carbon dioxide gas in the life raft. Accurate
temperature corrected pressure readings
cannot be calculated with carbon dioxide
present.
2.
Test Fixture. As assembled, test fixtures are not
stocked in the supply system; fixtures must be
fabricated to meet the requirements of the schematic
shown in Figure 4-1. A suggested test fixture,
consisting of two ON/OFF valves, pressure gauge
and adapters, is shown in Figure E-2 in Appendix E.
Figure E-2 shows the parts and materials required.
3.
Test Procedure. To test LRU-18/U life rafts,
proceed as follows:
CAUTION
Ensure test area is free of foreign objects.
a.
Ensure all carbon dioxide and the C02 cylinder have
been removed from any raft which has been
functionally tested.
Figure 4-1. Test Rig Schematic.
GO TO NEXT PAGE
4-12
