MIL-DTL-28839 Waveguides, Elliptical General Specification ForThis specification covers the requirements for flexible and semi-rigid waveguides with elliptical inside configuration \(see 6.1\).

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MIL-DTL-28839B

4.5.1.2.2 Rejected lots. If an inspection lot is rejected, the contractor may rework it to correct the defects, or

screen out the defective units, and resubmit for re-inspection. Resubmitted lots shall be inspected using tightened

inspection. Such lots shall be separate from new lots, and shall be clearly identified as re-inspected lots.

4.5.1.3 Group B inspection. Group B inspection shall consist of the inspections specified in table VI, in the order

shown. The sample for group B inspection shall be selected from inspection lots that have passed the group A

inspection.

TABLE VI. Group B inspection.

Requirement

Test method

Inspection

paragraph

Bending radius

Axial twist

Vibration 1/

Shock (specified pulse) 1/

Moisture resistance 1/

Thermal shock 1/

Power handling capability 2/

1/ Flexible type only.

2/ When specified (see 3.1 and 6.2).

4.5.1.3.1 Group B sampling plan. One length of the production lot shall be tested. If the size of the production lot

is greater than 25 pieces, one additional length shall be tested per each 25 additional pieces in the lot.

4.5.1.3.2 Failures. If one or more sample units fail to pass group B inspection, the lot shall be considered to have

failed.

4.5.1.3.3 Disposition of sample units. Sample units which have been subjected to group B inspection shall not be

delivered on the contract.

4.6 Methods of inspection.

4.6.1 Visual and mechanical inspection. Waveguides shall be examined to verify that the materials, design,

construction, physical dimensions, finish, length, marking and workmanship are in accordance with the applicable

requirements (see 3.3 thru 3.4.2, 3.16 and 3.17).