ABBREVIATED COMPONENT MAINTENANCE MANUAL
P/N 504414-SERIES
PAGE 10 OF 42
June 9, 2014
Rev. 2
25-20-217
Use or disclosure of information on this page is subject to the restrictions on the title page of this document
2. Operation
The restraint system is intended for use by the aircraft occupants. The system is specially designed to
restrain a human body (seat occupant) during all flight attitudes and landings. The lap belts can be
used separately or with the shoulder strap.
NOTE:
Refer to the installation instructions supplied by the seat manufacturer.
A.
Shoulder
Strap
The shoulder strap is equipped with an inertia reel, which performs length adjustment by reeling
the strap in or out and allows the upper part of the body freedom of movement. Sewn to the other
end of the strap is the connector, which is slid over the rivet on the lap belt for donning.
B.
Inertia
Reel
When the restraint system is in use, the inertia reel allows unrestricted movement in the seat.
The reel extends and retracts the shoulder harness as required. If a sudden acceleration force is
applied to the shoulder harness, the inertia reel will automatically lock. The occupant in the seat
is held by the shoulder harness. When the shoulder harness is relieved of the force, the locking
action of the inertia reel is released and unrestricted movement within the seat is once again
permitted.
C.
Lap
Belts
There is a buckle half with a fixed buckle and a connector half with an adjustable connector
especially designed for length adjustment.
D.
Fastening
In the seated position, pull the shoulder strap connector and slide it over the rivet on the lap belt
connector. Insert the lap belt connector into the buckle until the latch block audibly engages the recess
in the connector. For shortening the lap belt, pull the free end of the webbing at the connector. For
lengthening the belt, grasp the connector and rotate it approximately 45
. Pulling the connector will
lengthen the belt.
E.
Releasing
For releasing the lap belt, lift the buckle cover. This action will release the connector, which can then
be withdrawn from the buckle. Place the lap belt portions on the seat to prevent them from being
damaged and soiled.
The document reference is online, please check the correspondence between the online documentation and the printed version.