MIL-DTL-48559B
4.1 Classification of inspection. The inspection requirements specified herein are
classified as follows:
a. First article inspection (see 4.2)
b. Conformance inspection (see 4.3)
4.2 First article. When specified, a sample shall be subjected to first article
verification in accordance with Table III.
TABLE III. First article inspection.
Examination
Section 3
Section 4
or Test
Requirement
Verification
Storage temperature
3.4.1
4.4.1
Operating temperature
3.4.2
4.4.2
Shock
3.4.3
4.4.3
Vibration "A"
3.4.4
4.4.4
Mounting surfaces for M18A1 quadrant
3.5.1
4.5.1
Locating keys for M18A1 quadrant
3.5.2
4.5.2
Mounting surfaces for gunner's quadrant
3.5.3
4.5.3
Cross level adjustment
3.6.1
4.6.1
Backlash (cross level)
3.6.2
4.6.2
Boresight elevation adjustment
3.6.3
4.6.3
Boresight azimuth adjustment
3.6.4
4.6.4
Cross level knob torque
3.7
4.7
Boresight elevation adjustment screw torque
3.8
4.8
Interchangeability of mounting surface for M18A1 quadrant
3.9.1
4.9.1
Interchangeability of mounting surface of M172A1 mount
3.9.2
4.9.2
Interchangeability of mounting surface for M138A1 telescope
3.9.3
4.9.3
Workmanship
3.10
4.10
4.2.1 First article quantity. First article inspections shall be performed on three (3)
complete units.
4.2.2 First article inspection to be performed. The first article inspection shall be
performed in accordance with Table III.
4.2.3 First article rejection. If any item of the sample fails to comply with any of
the first article requirements, the first article shall be rejected.
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