MIL-PRF-31031B
4. VERIFICATION
4.1 Classification of inspections. The inspection requirements specified herein are classified as follows:
a. Qualification inspection (see 4.4 ).
b. Conformance inspection (see 4.5).
c. Periodic inspection (see 4.5.2).
4.2 Test equipment and inspection facilities. Test and measuring equipment and inspection facilities of
sufficient accuracy, reliability and quantity to permit performance of the required inspection shall be
established and maintained by the contractor. The establishment and maintenance of a calibration
system to control the accuracy of the measuring and test equipment (i.e., industry standards, military
standards) shall be required.
4.3 Inspection conditions. Unless otherwise specified, all inspections shall be performed in accordance
each test of threaded coupling connectors, where the test is performed on mated pairs, the pair shall be
torqued to the specified value (see 3.1).
4.3.1 QPL system. The manufacturer shall establish and maintain a system to meet the requirements
of MIL-STD-790 and the requirements herein (see 3.2). Evidence of such compliance shall be verified by
the qualifying activity as a prerequisite for qualification and retention of qualification. The following
exceptions to MIL-STD-790 shall apply.
a. Distributor, category A: An organization contractually authorized by a manufacturer to store and
distribute (sell) completely finished parts. These parts shall have been completely assembled and
inspected by the manufacturer to all the applicable requirements of the specification.
b. Basic plan: The manufacturer shall document a product assurance program plan in a manner
adequate to demonstrate compliance to section 5 of MIL-STD-790 or intent to comply prior to
receipt of qualification approval. When the program plan indicates intent to comply, the
documentation shall include an implementation schedule. One program plan shall be required by
a single manufacturing facility. The qualifying activity shall determine the adequacy and approve
the program plan in so far as it relates to the requirements specified in section 5 and appendixes A
and B of MIL-STD-790.
c. Distributor organizations: The manufacturers shall identify each authorized category A, B or C
distributor or distributor's assembly plant, the function each organization is authorized to perform,
and the authorized address at which the functions are performed. Any change in functions or the
addition or deletion of a distributor or a distributor's assembly plant shall be reported to the
qualifying activity within 10 days after such an occurrence.
d. Corrective action plan: Where failures or defects are greater than the prescribed limits, the
manufacturer shall prepare a plan or recommendation for corrective action. Corrective action
recommendations for performance failures shall include failure mode information and shall be
supported by verifying data, or a proposed evaluation test plan. Corrective action on parts
covered by the specification, which after design parameters previously submitted to the qualifying
activity, shall not be made without approval from the qualifying activity, except those actions which
consist only of improvements in control procedures. Corrective action affecting control procedures
shall not be implemented for production until approved by qualified personnel responsible for the
engineering, quality control, and reliability functions of the manufacturer.
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