MIL-DTL-25866C
provided that the material meets or exceeds the operational and maintenance requirements, and
promotes economically advantageous life cycle costs.
4. VERIFICATION
4.1 Classification of inspections. The inspection requirements specified herein are
classified as follows:
a. First article testing (see 4.2).
b. Conformance inspection (see 4.3).
4.2 First article testing.
4.2.1 First article test samples. The first article test samples shall consist of three lights
representative of the production equipment. They shall be tested in a laboratory designated by
the procuring activity or, when so stated in the contract, at the contractor's plant under the
supervision of the procuring activity.
4.2.2 First article tests. First article tests shall consist of all tests described under 4.5 and
shall be tested in the order show in table II.
TABLE II. First article test sequence.
Sample number 1
Sample number 2
Sample number 3
Examination of product
Examination of product
Examination of product
Illumination
Vibration
Humidity
(photometric)
Acceleration
Salt spray
High temperature
Shock
Sand and dust
Low temperature
Underwater operation
Explosion proof
Altitude
Portability
4.3 Conformance inspection. Conformance inspection shall consist of the individual
test.
4.3.1 Individual test. Each light shall be subjected to the examination of product
described in 4.5.1 and 4.5.1.1.
4.4 Test conditions.
4.4.1 Atmospheric conditions. Unless otherwise specified, the tests shall be made at an
atmospheric pressure of approximately 29.92 inHg and at room temperature of approximately
77 °F (25 °C). Where tests are made with pressure or temperature differing materially from
these values, proper allowance shall be made for the difference from the specified condition.
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