TM 1-4220-250-12&P
b.
Adjust the straps, taking up the slack until snug against the body.
2.3.1.3 Low Back Mounting Option.
FLIGHT CONTROL RESTRICTION
When worn on the lower back, the LRU-18/U with container will position the aviator
forward in the seat, causing certain size individuals in certain aircraft to experience aft
cyclic control restriction.
When worn on the lower back, the LRU-18/U with container will position the aviator
forward in the seat, causing exposure of some individuals forward of the armor plate.
a.
Place the SRU-37/P on the lower back, and connect buckles by crossing straps over chest - right to left and left to
right. Adjust straps to position the LRU-18/U with container for desired wearing position on lower back.
b. Ensure that the beaded inflation handle is accessible.
2.4 OPERATING PROCEDURES.
Do not initiate LRU-18/U activation procedures until rotor blades have stopped and
individuals are clear of the aircraft, since personal injury may result.
Inadvertent inflation can push the pilots forward resulting in a loss of aircraft control in the
AH-1, AH-64, or any other aircraft with similarly restricted cockpits. If inadvertent
inflation should occur, a knife or other sharp, pointed item shall be used to puncture the
raft.
COLD WEATHER OPERATIONS
When operating in cold temperatures, the raft automatic inflation time will be increased
2.4.1 Crewmember/Passenger LRU-18/U Life Raft Deployment Instructions.
NOTE
Do not discard the flight helmet after departing the aircraft. The helmet can be used to bail
water from the life raft. The container assembly is designed to allow inflation of the raft
while it is being worn by the user.
a.
After rotor blades have stopped, enter the water and when clear of the aircraft, firmly grasp the beaded inflation
handle and sharply pull it downward and out from the body. This will actuate the CO2 bottle. When the CO2 bottle
is actuated, raft inflation will automatically push open the velcro and snap fasteners of the container assembly. The
raft will fall free into the water and continue its inflation. The raft will take approximately 30 seconds to deploy.
The raft is secured to the user by the tether line which is attached to the container assembly.
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