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Arming pin/slider lock and auto trigger test. |
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|  MIL-F-63446B (AR)
retest shall reject the production lot. Two failures shall reject the first article sample. Any fuze
that fails the Fuzing Go Test shall be forced to function or disposed of in accordance with proper
safety procedures before removal from the fixture. This can be accomplished by increasing the
magnitude of the impulse to approximately 1,000 gravities. Should the armed fuze still not
trigger, a hang fire has occurred and must be handled accordingly. Revision must be made that
will allow for removal of the failed fuze from the test equipment while maintaining a shielded
condition.
4.5.17 Arming pin/slider lock and auto trigger test. Each fuze shall be subjected to and pass
the Arming Pin/Slider Lock and Auto Trigger test.
WARNING: This test is dangerous and all necessary safety precautions shall be taken. Test
operators shall be adequately shielded from the fuzes and their holding fixtures during arming and
resafing.
Remove shear wire if necessary prior to mounting the fuze in the holding fixture. After mounting
the fuze to the holding fixture, but prior to performing the test, the safety pin shall be removed.
Removal of the safety pin shall be considered as beginning of the arming operation and thus safety
shielding requirement applies. Upon removal of the safety pin, observe that the slider remains in
the fully safe position. Should the fuze arm upon removal of the safety pin, it shall be rejected as
a critical failure and disposed of in accordance with proper safety procedures. If the slider
remains in the safe position upon removal of the safety pin, the fuze shall then be allowed to arm
by raising the arming pin. The trigger shall not spontaneously release the detent ball and firing pin
when the slider moves to the fully armed position. Any fuze that fails this requirement shall be
classified as a critical failure and disposed of in accordance with proper safety procedures. Fuzes
that pass the Auto Trigger test shall be resafed by moving the slider back into its fully safe
position and lowering the arming pin until it is fully seated. The safety pin is reinserted after the
slider is back in to its fully safe position. Resafing is considered complete at the end of installation
of the safety pin. Any fuze that cannot be properly resafed shall be disposed of in accordance
with proper safety procedures.
4.5.18 Data requiremen ts. The contractor shall submit a quality inspection test
demonstration and evaluation report in accordance with 6.3.
5. PACKAGING
5.1 Special packaging requirement. To protect the escapement gear assembly from part
particulate contamination, each fuze shall be sealed in a plastic bag.
Fuzes shall be packaged in accordance with Dwg. 9340491.
5.2
5.3 Packing. Fuzes shall be packed in accordance with Dwg. 9340492.
Marking shall be in accordance with Dwg. 8799112.
5.4
5.5 Ammunition data cards. Data card information shall be as specified in MIL-STD-l167.
6. NOTES
(This section contains information of a general or explanatory nature that may be helpful, but is
not mandatory.)
6.1 Intended use. The M230 and M231 Fuze provide safe arming and fuzing for the
grenades used in the 2.75 Inch Rocket Multi-Purpose Submunition (MPSM).
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