MIL-DTL-60283C
4.3.3 Firing pin release. The subassembly shall be secured in the fixture. A pull shall be applied to
the initiator pin in the longitudinal direction, in conjunction with the fixture, which registers the amount
of pull.
4.3.4 Initiator pin security. The subassembly shall be secured in the fixture with the safety pin in
place. A pull shall be applied to the initiator pin in the longitudinal direction in conjunction with a
fixture, which registers the amount of pull. The test shall be performed with the safety pin in both
positions.
4.3.5
Functional.
4.3.5.1 Ballistics. The test sample shall be rigidly supported in the fixture. The sample shall be tested
within 5 minutes after removal from the conditioning chamber. When this time is exceeded, the sample
unit shall be reconditioned in accordance with 4.3.5.2. Required pressure readings shall be taken as
specified in 3.7.1.
4.3.5.2 Temperature conditioning. Each assembled initiator shall be conditioned for a period of time
not less than 4 hours nor greater than 24 hours. When reconditioning initiators at 60°F, all condensation
shall be removed from the interior surfaces before returning the initiator to the conditioning chamber.
4.4 Radiographic examination. All assembled initiators shall be radiographically examined in
accordance with ASTM E1742/E1742M, with exception that an initiator assembly will be used for the
penetrameter. Any observable imperfections in components or assembly shall be cause for rejection. The
initiators shall be positioned for the most revealing exposure, with the long axis of each assembly
perpendicular to the rays of the x-ray machine. All initiators shall be identified with serial numbers prior
to x-ray examination. The serial numbers shall be in consecutive numerical order beginning with the
number 001 in each production lot. Any missing serial numbers are to be identified on the x-rays. The
initiators shall be arranged on boards or trays in consecutive order and each radiograph shall carry a
permanent identification of the units displayed thereon. The radiographic plate identification shall
include item nomenclature, the complete lot number, the span of serial numbers displayed, and the
contract number. The radiographs of the entire production lot shall accompany the ballistic sample to the
activity conducting the production lot acceptance test. Defective initiators found during x-ray review are
to be marked on the x-ray prior to shipment, and those defective items shall be removed from the
production lot. Film interpretation of the radiographs shall verify the presence and correct positioning of
the following parts:
a.
O-ring present
P/N 10520496
b.
Steel balls present (3 ea)
P/N MS19060-3
c.
Firing pin
P/N 10520411
d.
Spring, initiator
P/N 10520412
e.
Seal
P/N 10520415
f.
Firing pin housing
P/N 10520410
g.
Filter
P/N 10520414
h.
Cap setscrews
(commercial)
i.
Cartridge, Impulse M91
P/N 8597230
j.
Initiator pin
P/N 10520553
4.5 Inspection of packaging. The sampling and inspection of the preservation, packing, and container
marking shall be in accordance with the requirements of section 5.
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