[Code of Federal Regulations]
[Title 14, Volume 1]
[Revised as of January 1, 2004]
From the U.S. Government Printing Office via GPO Access
[CITE: 14CFR21.125]

[Page 132-133]
 
                     TITLE 14--AERONAUTICS AND SPACE
 
CHAPTER I--FEDERAL AVIATION ADMINISTRATION, DEPARTMENT OF TRANSPORTATION
 
PART 21--CERTIFICATION PROCEDURES FOR PRODUCTS AND PARTS--Table of Contents
 
            Subpart F--Production Under Type Certificate Only
 
Sec. 21.125  Production inspection system: Materials Review Board.

    (a) Each manufacturer required to establish a production inspection 
system by Sec. 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 Sec. 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.

[[Page 133]]

    (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.