Download the PDF consolidation of Part 21 [PDF 439 KB]
This Subpart prescribes rules governing—
(1) the approval of designs for articles by the issue of a NZTSO authorisation; and
(2) the responsibilities of the holder of a NZTSO authorisation.
In this Part:
Article means any material, part, process, or appliance.
(a) A NZTSO authorisation is—
(1) a design approval issued to the manufacturer of an article that has been found to meet a NZTSO; and
(2) an authorisation to mark an article with the letters NZTSO.
(b) A person must not apply a NZTSO marking to an article unless that person holds a NZTSO authorisation in respect of that article and the article meets the NZTSO performance standards.
(a) The applicant for the grant of a NZTSO authorisation must—
(1) be the holder of, or the applicant for, a manufacturing organisation certificate issued under Part 148; and
(2) have made all necessary preparations to, or be able to, produce the article.
(b) In addition to paragraph (a), if the Director determines that the specification includes significant airworthiness requirements, the applicant for the grant of a NZTSO authorisation must—
(1) be the holder of, or the applicant for, a design organisation certificate issued under Part 146 with a rating appropriate to the article to be produced; or
(2) arrange for the holder of a design organisation certificate with a rating appropriate to the article to be produced to show compliance with the specification; or
(3) have an equivalent procedure acceptable to the Director.
Each applicant for the grant of a NZTSO authorisation must provide the following information on (or, if that is not practicable, with) the approved CAA form—
(1) the name and address for service in New Zealand of the applicant; and
(2) evidence that the applicant can—
(i) comply with the design and performance requirements of the NZTSO; and
(ii) reliably reproduce each article in accordance with the technical conditions of the applicable specification; and
(3) one copy of the technical data required by the applicable NZTSO; and
(4) a statement of compliance by the applicant, or for an article that the Director determines includes significant airworthiness requirements, by the holder of a design organisation certificate issued under Part 146, stating that each article to be produced will comply with the technical conditions of the applicable specification; and
(5) such further particulars relating to the applicant as may be required by the Director as indicated on the form—
and submit it to the Director with a payment of the appropriate application fee prescribed by regulations made under the Act.
An applicant is entitled to a NZTSO authorisation if—
(1) the applicant meets the applicable requirements of this Subpart in a manner acceptable to the Director; and
(2) the granting of the certificate is not contrary to the interests of aviation safety; and
(3) the applicant has obtained a manufacturing organisation certificate issued under Part 148.
(a) The holder of a NZTSO authorisation for an article may—
(1) manufacture the article subject to compliance with 21.621 and 21.623(a) and (b); and
(2) identify the article with the NZTSO marking.
The NZTSO authorisation may be suspended or revoked if the Director determines that—
(1) the conditions required under this Subpart for the grant of an authorisation are no longer being observed; or
(2) the specification has been—
(i) cancelled; or
(ii) revised to such an extent that the existing authorisation is no longer appropriate; or
(3) the manufacturing organisation certificate issued under Part 148 is suspended or revoked; or
(4) the responsibilities of the holder specified in 21.621 are no longer being discharged; or
(5) the article has been shown to give rise to unacceptable hazards in service.
(a) A NZTSO authorisation issued under this Subpart remains in force until it is suspended or revoked.
(b) The holder of a NZTSO authorisation that is revoked must surrender the certificate to the Director as soon as practicable.
(c) The holder of a NZTSO authorisation that is suspended must as soon as practicable produce the certificate to the Director for appropriate endorsement.
A NZTSO authorisation issued under this Subpart is not transferable.
Each manufacturer of an article who is the holder of a NZTSO authorisation for that article must —
(1) manufacture each part in accordance with the manufacturing organisation certificate issued under Part 148; and
(2) ensure that each completed article conforms to its design data and is safe for installation; and
(3) prepare, maintain, and update master copies of all manuals required for the maintenance and operation of the product; and
(4) make available to the users of the article those maintenance, overhaul, and repair manuals necessary for the maintenance and operation of the article; and
(5) permanently and legibly mark each article with the following information—
(i) the information prescribed in 21.813; and
(ii) the name, type, or part number of the article; and
(iii) the applicable NZTSO number; and
(6) upon the Director’s request, make the maintenance, overhaul, and repair manuals and any other records required by 21.625 available to the Director.
(a) No person may make design changes to an article under this Subpart unless—
(1) they are the holder of the appropriate NZTSO authorisation; or
(2) they apply for a separate NZTSO authorisation.
(b) The holder of a NZTSO authorisation may make design changes to an article it manufactures, other than significant design changes, without further authorisation by the Director provided the holder—
(1) retains the basic model number of the article; and
(2) identifies any design change by a model number suffix or part number change; and
(3) forwards to the Director any revised data that is necessary to identify the design change and show continued compliance with the NZTSO.
(c) The holder of a NZTSO authorisation intending to make a significant design change to an article it manufactures must—
(1) assign a new type or model designation to the article; and
(2) apply for a new NZTSO authorisation.
(a) Each holder of a NZTSO authorisation must establish procedures to—
(1) identify, collect, index, store, maintain, and dispose of—
(i) records of each model of each article manufactured by the holder under a NZTSO authorisation; and
(ii) all relevant design information, drawings, specifications, tests, analyses, and reports that show the articles comply with the applicable NZTSO and this Part; and
(2) ensure that—
(i) all records are legible and of a permanent nature; and
(ii) except as provided in paragraph (b), the records required by paragraph (1) are retained for a period of 2 years from the date the last example of the article is permanently withdrawn from service.
(b) The Director may permit records to be retained for a lesser period than that required by paragraph (a)(2)(ii).
