MIL-DTL-5794C
4. VERIFICATION
4.1 Classification of inspections. The inspection requirements specified herein are classified as
follows:
a. First article inspection (see 4.3).
b. Conformance inspection (see 4.4).
4.2 Inspection conditions. Unless otherwise specified, all inspections shall be performed in
accordance with the test conditions specified in 4.5.
4.3 First article inspection (microphone only). When required (see 6.2), first article inspection shall
consist of all of the tests in table III and the inspections specified for groups A, B, and C (see table IV,
4.3.1 Sample size. Ten (10) microphones shall be submitted for first article inspection. The units
selected shall be representative of "production configuration" in design, materials, construction and
performance.
4.3.2 Inspection routine. The sample shall first be subjected to the inspections specified in table III, in
the order shown. All sample units shall then be subjected to the inspections of group A in table IV. The
sample shall then be divided equally into two groups of 5 (five) units each. One group shall be subjected
to the group B inspections, and the other group shall be subjected to group C inspections, as specified in
table IV.
4.3.3 Failures. If one or more sample units fail to pass any group inspections, the sample lot shall be
considered to have failed.
4.3.4 Noncompliance. If a sample fails to pass first article inspection, the manufacturer shall notify the
procuring activity and the responsible Government inspector of such failure and take corrective action on
the materials or processes, or both, as warranted. The manufacturer shall also take corrective action on
all units of product, which can be corrected, were manufactured under essentially the same materials and
processes, and are considered subject to the same failure. Acceptance of the product shall be
discontinued until corrective action, which is acceptable to the procuring activity, has been taken. After
the corrective action has been taken, first article inspection shall be repeated on additional sample units
(all inspections, or the inspection which the original sample failed, at the option of the procuring activity).
Final first article approval shall be withheld until the first article inspection has shown that the corrective
action was successful.
TABLE III. First article inspection.
Inspection
Requirement
Inspection
paragraph
paragraph
Moisture resistance
Altitude
Temperature extreme
Vibration
Salt atmosphere
Anti-Packing
Gun blast
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