MIL-DTL-18239E(AS)
3.7 Workmanship. Workmanship, fabrications, and manufacturing processes shall conform
to the requirements of MIL-E-5400. Particular attention shall be paid to neatness and
thoroughness of soldering, wiring, impregnation of coils, plating, staking, riveting, machine screw
assemblage. All dimensions and tolerance not specified on the applicable drawings shall be held
as close as is consistent with the best shop practice. Where dimensions and tolerances affect the
interchangeability, operation, or performance of the earphone, they shall be held or limited
accordingly. All units shall be inspected for loose, spattered, or excess solder. Metal chips and
other foreign material, if found to be present, shall be removed prior to final assembly.
4. QUALITY ASSURANCE PROVISIONS
* 4.1 The text of this paragraph has been deleted. The number has been retained to keep the
numbering sequence correct.
* 4.2 Classification of tests. The inspection and testing of earphones shall be classified as
follows:
a. First article inspection (see 4.4).
b. Conformance inspection (see 4.5).
4.3 Inspection conditions. Unless other specified, all inspections shall be performed in
accordance with the test conditions specified in the applicable test method document or applicable
paragraphs of this inspection.
* 4.4 First article inspection. First article inspection shall be performed at a laboratory
acceptable to the Government on sample units produced with equipment and procedures normally
used in production. The first article inspection sample shall consist of items of each
manufacturer's part number for which approval is desired. The first article inspection shall consist
of all the tests of this specification specified in 4.7. Contractors not having laboratory testing
facilities satisfactory to the Government for sampling tests shall engage the services of a
commercial testing laboratory acceptable to the Naval Air Warfare Center Aircraft Division
Detachment Indianapolis, Code 1.1.2, 6000 E 21st , Indianapolis, IN 46219-2189. Items for
testing must be separately packaged and forwarded to the activity responsible for qualification as
designated in the letter of authorization. The sample shall in all respects be respective of the
manufacturer's production item. Each of the items shall be subjected to the applicable inspections
specified in this specification. Samples shall be plainly identified by securely attached durable tags
marked with the following information.
a. Sample for first article test.
b. Specification.
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