Revere Coastal Commander 2.0, Service Manual

Page: 58 / 170

May 24, 2018
4 - 10
Testing
9120
INFLATABLE CHAMBERS (AIR HOLDING OR WORKING PRESSURE TEST)
Each chamber must be tested separately, but simultaneously over a period of approximately 1 hour.
1. Using an inflation tool (Part No. 95- 41128-101) and clean, dry shop air, inflate the upper
buoyancy chamber to until the pressure relief valve (PRV) opens. This will also inflate the arch-
tube. The PRV will open at 2.31 psig MAX and produce bubbles when covered with soapy water.
Using a manometer, record the pressure (psig) upon PRV release.
2. Follow the same procedure in Step One to inflate the lower buoyancy chamber. Record the
pressure upon PRV release. Inflation of the right buoyancy chamber will not affect the arch-tube.
3.
Let stand for 15min. This will allow the chambers to stabilize. Air will stop releasing from the PRV
and bubbles should disappear.
4. Correct pressure using clean shop air to a test pressure of 1.50+/- 0.050 psig. Using a
manometer, check the pressure in the chambers. Record the initial tube pressure
(Pi
tube
)
,
temperature (
Ti)
, time, and barometric pressure (
Pi
amb
)
. Leave sitting for 1 hour.
5. Inflate the floor until firm and leave sitting for 1 hour.
6. Check the buoyancy chambers after 1 hour. Record the final tube pressure (Pf
tube
), temperature
(
Tf
), time, and barometric pressure (
Pf
amb
) (See Table A). Calculate the corrected pressure
(P
corrected
) if temperature and/or barometric pressure changes during the one hour test. (See
Table A for formula and Tables B)
7. If the change in the pressure of the tube is greater than 5% of the initial pressure (not lower than
1.47psi), the liferaft has failed. Refer to Table C for fault isolation and Chapter 7 – Repair.
Raft has failed if:
Raft has passed if:
8. Once the repairs are completed, retest failed chamber.
9.
If all chambers, including the floor, pass their air retention tests or if repairs have been made,
please refer to Chapter 8 – Assembly/Packing.
Pi
tube
- P
corrected
x 100% ≥ 5%
Pi
tube
Pi
tube
- P
corrected
x 100% < 5%
Pi
tube