MIL-DTL-87255A(USAF)
4.
VERIFICATION
4.1
Classification of inspections.
The inspection requirements specified herein are classified as follows:
a. First article inspection (see 4.2).
b. Conformance inspection (see 4.3).
4.2
First article inspection.
First article inspection shall be as specified by the contracting activity. Table III consists of all
the examinations and tests of this specification.
4.2.1 First article samples.
The samples shall be of identical construction, workmanship, components, and materials to be
used during production. When a contractor is in continuous production of these valves, from
contract to contract, first article inspection on the new contract may be waived at the discretion
of the contracting activity (see 6.2). Approval of the first article inspection samples or the
waiving of the first article inspection does not preclude the requirements for performing the
conformance inspection.
4.2.1.1 Disposition of sample units.
Upon completion of the first article inspection, all the applicable inspection reports, sample
valves, and when applicable, recommendations and comments pertinent for use in monitoring
production will be forwarded to the cognizant Government activity. One of the approved first
article inspection samples of the valves will be returned to the contractor for use in monitoring
production. The other valves will be consumed or destroyed in the first article inspection and
shall not be considered as part of the quantity to be delivered under the contract or purchase
order.
4.3
Conformance inspection.
Conformance inspection shall consist of the examination and tests specified in table IV. The
sampling and inspection levels and acceptance criteria shall conform to MIL-STD-1916 or
ANSI/ASQ Z1.4. The lot from which the valve samples were selected shall be rejected if any
sample fails to comply with any requirement specified. A rejected lot shall not be resubmitted
except with the approval of the contracting officer.
4.3.1 Endurance acceptance criteria.
The endurance requirements of 3.5.12 shall be verified by lot sampling tests to be conducted at
the contractor s facility in accordance with the criteria specified in 4.5.13. The acceptance
criteria for the first sampling test is 30,060 cycles with zero failures. The 30,060 cycles shall be
accumulated on two units, 15,030 cycles on each unit, selected from the first 10 units produced
under this specification. One unit out of every subsequent production lot of 500 shall be
subjected to 15,030 cycles to the criteria stated above with zero failures as the acceptance
criteria. Corrective actions for all failures shall be determined and recommended to the
procuring activity. In the event of non-compliance (reject decision), or when a pattern failure
occurs, the contractor shall immediately notify the procuring activity. Changes of specified
performance or required endurance characteristics of the valves are not corrective action.
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