MIL-C-46221B
4.7.8.2.1 First article. Twenty-one cartridges of the first article sample shall be grouped and temperature
conditioned as described in table III and 4.8. Following removal from the conditioning chamber, the cartridge
shall be tested as required by 3.6.2.2. Failure of any cartridge to comply with 3.6.2.2 shall be cause for sample
rejection.
4.7.8.2.2 Production lot acceptance. Twenty-one assembled cartridges from each production lot shall
be loaded into acceptable M4A1 catapults, divided into three equal groups, temperature conditioned, and fired
in accordance with 3.6.2.2. Failure of any cartridge to comply with 3.6.2.2 shall be cause for rejection of the
lot. In addition to the sample of cartridges for the above test, 10 additional cartridges shall be furnished from
each production lot for investigative purposes.
4.7.8.2.2.1 Sealant application. Five cartridges from each production lot shall be selected for this test.
The cartridge shall be disassembled in such a manner that determination can be made that the sealant has been
applied for the full length of the joining surfaces at the junction of the cartridge head and case sidewall and
that the propellant cavity is free of sealant. Failure of any cartridge to comply with the drawing requirements
shall be cause for rejection of the lot of cartridges.
4.7.8.3 Retest. There shall be no retests.
4.7.8.3.1 Test failure. If a test failure is attributable to an assignable cause, excluding the test cartridge,
the original test results shall be discarded and that test reconducted.
4.8 Temperature conditioning. The conditioning chamber shall be preconditioned to the specified
temperature. Once the temperature inside the chamber has stabilized, the samples shall be placed inside and
maintained at the specified temperature for 4 hours minimum, 24 hours maximum.
4.8.1 Reconditioning. The sample must be tested within ten minutes after removal from the conditioning
chamber. If this time is exceeded, the cartridge shall be reconditioned in accordance with 4.8.
4.9 Inspection of packaging. The sampling and inspection of the preservation, packing, and container
marking shall be in accordance with the requirements of section 5.
5. PACKAGING
5.1 Packing and marking. Packing and marking shall be Level A or B, as specified by the contracting
activity (see 6.2). Level A shall be in accordance with Drawings 8797379 and 8797380. Level B shall be in
accordance with Drawings 8797379 and 9225381.
6. NOTES
(This section contains information of a general or explanatory nature that may be helpful but is not
mandatory.)
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