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|  MIL-R-8236F
5.2.3 Commercial. Inertia reels preserved as specified (see 5.1) shall be packed in accordance with ASTM
D-3951.
5.3 Marking. In addition to any special marking required by the contract or order, shipping containers shall
be marked in accordance with MIL-STD-l 29 or ASTM D-3951, as applicable.
6. NOTES
(This section contains information of a general or explanatory nature that maybe helpful. but is not
mandatory.)
6.1 Intended use. The shoulder harness take-up, inertia-lock reel is intended as a safety device for seat
occupants to restain torso and head/neck movement during a crash. deceleration. or violent flight motion of an
aircraft.
6.2 Specific applications. Each specific application of the QPL inertia reel shall require the inertia reel be
subjected to "as installed" system testing tailored to evaluate the suitability of the QPL inertia reel for the intended
application. Such evaluation cannot occur without the inertia reel being either on a QPL or satisfactorily
completing the qualification testing required herein prior to the evaluation. Qualification of an inertia reel to 1
type of designation shall not be constructed as qualification m any other type designation contained in this
specification. Nor shall the approval of an inertia reel for a particular application be construed as approval for any
other application not specifically identified in that approval.
6.1.1.1 Procedures. Approval of an inertia reel for a specific airmail application requires review and approval
of the service tests (see 4.2.2) by both the Government Qualifying Activity for inertia reels and the Cognizant
Engineering Activity or Configuration Manager for the aircraft.
6.2 Acquisition requirements. Acquisition documents must specify the following:
a. Title. number, and date of this specification.
b. Type of inertia reel required (see 1.2).
c. Dimension "A" (see Figures 1 through 3 and 6.2.1a).
d. Dimension "B" (see 6.2 lb).
e. If service test samples are required, instructions for submittal (see 3.2.2 and 4.2.2).
f. Level of packing required (see 5.2).
g. Whether special marking for shipment is required (see 5.3).
h. Data requirements. if any (see 6.5).
6.2.1 Dimensions. For specific aircraft installations. the procuring activity should specify:
a. Dimension "A" on Figures 1 through 3, as applicable, shall be 0.0 inch plus any number of 2 inch
increments until a length of 20 inches is reached, or 20 inches pi us any number of 5 inch increments
thereafter.
b. Dimension "B" on Figures 1 through 3, as applicable, shall be 14 inches plus any number of 2 inch
increments until a length of 30 inches is reached. or 30 inches plus any number of 5 inch increments
thereafter.
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