(a) Each manufacturer required to establish a production inspection system by §21.123(c) shall—
(1) Establish a Materials Review Board (to include representatives from the inspection and engineering departments) and materials review procedures; and
(2) Maintain complete records of Materials Review Board action for at least two years.
(b) The production inspection system required in §21.123(c) must provide a means for determining at least the following:
(1) Incoming materials, and bought or subcontracted parts, used in the finished product must be as specified in the type design data, or must be suitable equivalents.
(2) Incoming materials, and bought or subcontracted parts, must be properly identified if their physical or chemical properties cannot be readily and accurately determined.
(3) Materials subject to damage and deterioration must be suitably stored and adequately protected.
(4) Processes affecting the quality and safety of the finished product must be accomplished in accordance with acceptable industry or United States specifications.
(5) Parts and components in process must be inspected for conformity with the type design data at points in production where accurate determinations can be made.
(6) Current design drawings must be readily available to manufacturing and inspection personnel, and used when necessary.
(7) Design changes, including material substitutions, must be controlled and approved before being incorporated in the finished product.
(8) Rejected materials and parts must be segregated and identified in a manner that precludes installation in the finished product.
(9) Materials and parts that are withheld because of departures from design data or specifications, and that are to be considered for installation in the finished product, must be processed through the Materials Review Board. Those materials and parts determined by the Board to be serviceable must be properly identified and reinspected if rework or repair is necessary. Materials and parts rejected by the Board must be marked and disposed of to ensure that they are not incorporated in the final product.
(10) Inspection records must be maintained, identified with the completed product where practicable, and retained by the manufacturer for at least two years.