G. This Headset-Microphone Kit is designed to fit both the regular and large size Combat Vehicle Crewman\'s Helmet. The electrical characteristics of the kit are compatible with Tactical Radio Systems, such as the VRC-12.

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MIL-DTL-55535A

4.2 Inspection conditions. Unless otherwise specified herein, the examinations and the tests specified

herein shall be performed under the following standard test conditions:

a. Temperatures between + 59� and + 95� F.

b. Normal ground altitude.

c. Prevailing room ambient humidity.

d. No vibration.

4.3 First article inspection. This inspection shall be performed by the contractor and witnessed by a

Government inspector. It shall consist of groups A, B, and C inspections (see table II, table III, and

table IV respectively) on 20 samples. The first article samples will be inspected in this order: group A,

group B and divided up for group C inspection as follows: 2 units (MK-1039/G) for each of the ten (10)

group C tests listed in table IV. After the completion of group C testing, all acceptable units shall be

subjected to and pass all group A inspections.

4.4 Inspection covered by subsidiary documents. The finish (see 3.4) and marking (see 3.5) shall be

inspected under the applicable documents, as part of the inspection of equipment before preparation for

delivery:

4.5 Conformance inspection of equipment. The contractor shall perform the inspections specified in

4.4, 4.5.1, 4.5.2, 4.5.3 and 4.5.4. This does not relieve the contractor of his responsibility for performing

any additional inspection, which is necessary to control the quality of the product and to assure

compliance with all specification requirements. The Government inspector will review and evaluate the

contractor's inspection records. Each unit, which will be subjected to group A inspection, except first

article samples, shall be preconditioned after final assembly (see 3.13).

4.5.1 Group A inspection. This inspection, including sampling, shall be specified in table II. Group A

inspection shall consist of 100 percent of each lot. If one or more defects are found, the defective

microphone unit(s) shall be removed. All failures occurring during testing shall be documented and

investigated to determine root cause. Acceptance of the product shall be discontinued until corrective

action, which is acceptable to the procuring activity, has been taken. After the corrective action has been

taken, the group A inspections shall be repeated (all inspections, or the inspection which originally failed,

at the option of the procuring activity). Approval shall be withheld until the inspection has shown that the

corrective action was successful. If one or more defects are found during the second inspection, the lot

shall be rejected and shall not be supplied to this specification.

4.5.1.1 Order of inspection with group A. Group A inspection shall be performed in any order, which is

satisfactory to the Government.