MIL-DTL-48558C
Drawing number
4.3.2.4
Elbow telescope.
13005104
Next higher
assembly
Conformance
Requirement
None
Classification
Examination or test
criteria
paragraph
Inspection
method reference
Critical
None defined
Major
101
Presence of Plate,
100%
3.3
Visual
Identification, 13010960
102
Completeness of assembly
100%
3.3
Visual
103
Orientation
100%
3.4
4.4
104
Collimation of reticle
100%
3.4.1
4.4.1
105
Storage temperature
3 units per lot 1/
3.5.1
4.5.1
106
Operating temperature
100%
3.5.2
4.5.2
107
Shock
100%
3.5.3
4.5.3
Vibration "B"
108
100%
3.5.5
4.5.5
109
Collimation change, post
100%
3.6
4.6
shock and vibration
110
Sealing
100%
3.7
4.7
111
Purging
100%
3.8
4.8
112
Parallax
100%
3.9.1
4.9.1
113
Reticle accuracy
100%
3.9.2
4.9.2
114
Parallelism of reticle and
100%
3.9.3
4.9.3
image
115
Resolution
100%
3.9.4
4.9.4
116
Cleanliness
100%
3.9.5
4.9.5
117
Torque of diopter
100%
3.10.1
4.10.1
adjustment
118
Attachment
100%
3.10.2
4.10.2
119
Reticle illumination
100%
3.11
4.11
120
Interchangeability
100%
3.12
4.12
Minor
201
Workmanship
VL-II
3.13
4.13
NOTES:
1/ Lot shall be accepted if there are 0 failures, and rejected if there are 1 or more failures.
4.4 Orientation. Test fixture 10558254 or equivalent shall be used for the
inspection of the M138A1 Elbow Telescope. Follow the calibration and setup instructions
on 10558254 prior to positioning the telescope to the fixture. The telescope shall be
oriented and secured on the test fixture as specified in 3.4 to verify compliance with this
requirement.
4.4.1 Collimation of reticle. With the orientation of 4.4 established, the intersecting
point of the boresight cross of the telescope reticle shall be within the tolerance block of the
10
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