MIL-DTL-48554B
4.2 First article. When specified, a sample shall be subjected to first article
verification in accordance with Table III.
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 the first
article requirements, the first article shall be rejected.
4.3 Conformance inspection.
4.3.1 Lot formation. Lot formation shall be in accordance with the lot formation
requirements of MIL-STD-1916, paragraph "Formation and identification of lots and
batches."
4.3.2 Conformance inspection quantity. Conformance inspection quantities shall be
in accordance with MIL-STD-1916, paragraph "Sampling of lots or batches." All major
and minor characteristics shall be verification level IV.
4.3.3 Conformance inspection to be performed. The conformance inspection shall
be performed in accordance with Table III.
4.4 Orientation. Test fixture 10558252 shall be used for the inspection of the
M137A2 and M137A3 Panoramic Telescopes. Position the test fixture on a vibration free
surface in accordance with the set-up instructions on 10558252. Follow the calibration and
set-up instructions prior to positioning the telescope to the fixture. Subsequent to
completion of all set-up instructions, the telescope shall be able to be oriented on test
fixture 10558252 under the conditions specified in paragraph 3.4.
4.5 Collimation change, post vibration. Subsequent to the completion of 4.19.3
Vibration "A" or 4.19.4 Vibration "B", and with the conditions of 3.4 re-established
without readjusting boresight or rotating the azimuth knob, the line of sight shall not have
deviated from its pre-vibration readings of the azimuth and deflection or bearing counters
more than the deflection allowed in 3.4.1.
4.6 Optical characteristics.
4.6.1 Eyepiece focus. A three power dioptometer that has been adjusted to the
individual eye shall be used. Individual eye adjustment can be accomplished by sighting
through the dioptometer at a white background and adjusting the eyepiece of the
dioptometer until the reticle is at the sharpest point obtainable. Sight through the
dioptometer and the eyepiece of the telescope. Observe the reticle of the telescope, and
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