MIL-PRF-62539A
3.6 Environmental requirements. The module shall operate under the following
environmental conditions, without degradation in performance.
3.6.1 Waterproofness. After being submerged in 5 % of saline solution (5 parts by weight
of salt in 95 parts by weight in distilled water).
3.6.2 Shock resistance. After exposure to shock resistance test.
3.6.3 Vibration resistance. During and after exposure to vibrations encountered in the
operating environment.
3.6.4 Temperature shock resistance. After exposure to temperature shock.
3.6.5 Salt fog resistance. After exposure to salt fog.
3.6.6 Humidity resistance. After storage under induced high temperature and humidity
conditions.
3.6.7 Fungus resistance. After exposure to fungal growth.
4. VERIFICATION
4.1 Classification of inspections. The inspection requirements specified herein are
classified as follows:
a. First article inspection (see 4.3.1).
b. Conformance inspections (see 4.3.2).
4.2 Verification methods. The types of verification methods included in this section are
visual inspection, measurement, sample tests, full-scale demonstration tests, simulation, modeling,
engineering evaluation, component properties analysis, and similarity to previously-approved or
previously-qualified designs.
4.2.1 Verification alternatives. The manufacturer may propose alternative test methods,
techniques, or equipment, including the application of statistical process control, tool control, or
cost-effective sampling procedures, to verify performance. See the contract for alternatives that
replace verifications required by the specifications.
4.3 Order of inspection. The inspection sequence may be in any order.
4.3.1 First article inspection. First article inspection shall be performed on the first four
production samples as specified in table I.
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