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Class I and unknown cause malfunctions. |
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|  MIL-S-63348A(AR)
4.7.5.5.2.2 Class I and unknown cause malfunctions. When the
malfunction cause is classified as class I or the malfunction cause
cannot be determined, the contractor shall correct the rejected
weapons and shall test the first eighty weapons on the following
shift by firing two thirty round sequences in accordance with
paragraph 4.7.5.4.2. When the number of malfunctions occurring
during the test of eighty weapons exceeds one, the contractor shall
continue function firing acceptance testing in accordance with
paragraph 4.7.5.4.2 until corrective action has been accomplished to
the applicable manufacturing process or quality assurance procedures
or both, as evidenced by the testing of eighty connective weapons
with one or less malfunctions. In the event the malfunction number
is one or less during this test, normal function firing testing
shall be resumed for all subsequent weapons submitted during this
shift.
*
4.7.6 Targeting and accuracy test, This test shall be
performed in accordance with individual weapons test of Table III,
A Government approved firing stand and target shall be used, The
ammunition used in this test shall be as specified in 3.4.5.
4.7.6.1 Warm-up.
Except for rounds fired during function
testing, firing of not more than ten (10) warm-up shots off the test
target shall be allowed before the weapons are tested for targeting
and accuracy.
4.7.6.2 Firing procedure.
Ten rounds shall be fired. The
target shall then be checked to determine that the targeting and
accuracy requirements have been met (see 3.4.5). Targets with
evidence of a flyer (see 6.5.2) or keyholing (see 6.5.3) shall be
cause for the contractor to repeat the test by firing a ten round
complement.
4.7.6.2.1 Recording data.
The following data shall be recorded:
a.
Number of weapons tested and number of weapons rejected
per lot.
b.
Test date.
Ammunition lot number.
d.
Extreme spread of shot group.
Reason for retest (flyer and keyholing).
e.
f.
For each weapon that fails, record the following:
1. Serial number.
2. Type of malfunction or failure (see 6.5).
4.7.6.3 Rejected
weapons, Weapons rejected for failure to meet
the targeting and accuracy requirements shall be corrected by the
contractor, and the corrective action shall be recorded.
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