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|  MIL-G-85299(AS)
3.2 First article. When specified in the contract or purchase order, a
sample shall be subjected to first article inspection (see 4.4 and 6.3).
3.3 Parts and materials.
3.3.1 General requirements. Parts and materials used in the test set shall
conform to the requirements of DL 1058AS110O, except insofar as errors on the
drawings may be incompatible with the requirements of this specification and
related specifications.
Approval for the use of nonstandard parts
3.3.2 Nonstandard parts approval.
shall be obtained by the contractor as specified in MIL-STD-965.
In the event that the contractor proposes
3.3.3 Supplemental requirements.
to alter the equipment delineated by this specification and applicable
drawings, the supplemental requirements specified in 3.3.3.1 and 3.3.3.2 for
the selection of parts and materials shall be applicable.
3.3.3.1 Basic conformance. Parts and materials selected for use in the
equipment shall be as specified in MIL-T-28800. Parts shall be selected from
those conforming to MIL-E-5400, unless the parts selected will not perform as
required in the intended applications and environments specified herein, in
which case 3.3.2 applies.
3.3.3.2 Interchangeability. All parts and materials shall meet the
interchangeability requirements as specified in MIL-T-28800. The drawings
conforming to DL 1058AS11OO shall be the standard for measuring interchange-
ability of all applicable units, assemblies, subassemblies and parts.
3.4 Design and construction. The test set shall be manufactured in
accordance with DL 1058AS11OO, except that errors of omission or commission on
the drawings may be incompatible with the requirements of this specification.
In any case, it is a condition of final acceptance that the equipment
manufactured shall meet all the design, construction, and workmanship
requirements of this specification.
3.4.1 Reliability.
3.4.1.1 Operational stability. The test set shall operate as required
continuously or intermittently, for a period of at least eight hours. During
this time, it shall not be necessary to readjust any controls.
3.4.1.2 Operating life. The test set shall have a minimum total operating
life of 10,000 hours with minimal servicing and replacement of parts.
3.4.1.3 Reliability in mean-time-between-failures (MTBF). The test set shall
have a lower mean- (operating) time-between-failures of 250 hours
as
specified in MIL-STD-781 when tested in accordance with 4.5.3.
3.4.2 Standard conditions. The following conditions shall be used to
establish the normal performance characteristics under standard conditions for
performing laboratory-bench tests:
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