Subpart K - Materials, Parts, Components and Appliances

21.301 Purpose

This Subpart details requirements for the acceptance of materials, parts, components and appliances.

21.303 Replacement and modification of parts, components and appliances

(a) A replacement or the design change of a new or used part, component or appliance to be installed in an aircraft registered in the Territory shall conform to the certification standards of the applicable Type Acceptance Certificate and any applicable Supplemental Type Certificate and:

(1) be supported by an authorised internationally-accepted release certificate issued by an organisation approved by an NAA listed in paragraph 21.25(a)(1); or

(2) for new parts and appliances only, be supported by a release certificate from an NAA not identified in paragraph 21.25(a)(1) when subject to the requirements of an active bilateral agreement covering such matters with an NAA of Type Certification listed in paragraph 21.25(a)(1); or

(3) for new parts and appliances only, in the case of an aircraft whose TAC was issued on the basis of a Type Certificate issued by ANAC, supported by a release certificate issued by an organisation approved by ANAC.

(b) An organisation may fabricate a restricted range of parts to be used in the course of undergoing work within its own facilities in a manner acceptable to the Governor.

21.305 Materials

Materials to be utilised for the repair, replacement and design change of an aircraft registered in the Territory shall be:

(a) of a specification specified in approved data; and

(b) in conformance with any Type Certificate Holders criteria; and

(c) obtained from an approved supplier and accompanied by an accredited release certificate.

21.307 Parts Manufacturer Approval (PMA)

PMA parts may be accepted for modification and/or replacement parts for installation on a Territory registered aircraft if:

(a) the PMA part is not a “critical component"; or 

(b) the PMA part conforms to design data obtained under a licensing agreement from the TC or STC holder; or

(c) the PMA holder is the holder of an STC which incorporates the PMA part.


Change Information

  1. First Issue - published for information June 2004
  2. Second issue - published for information April 2005
  3. Third issue – released for gazetting July 2005
  4. Fourth issue – April 2011
  5. Fifth issue – October 2013
  6. Sixth issue – January 2015
  7. Seventh issue - August 2017
  8. Eighth issue - January 2019

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