TITLE 14 - AERONAUTICS AND SPACE

CHAPTER I - FEDERAL AVIATION ADMINISTRATION, DEPARTMENT OF TRANSPORTATION

SUBCHAPTER C - AIRCRAFT

PART 21 - CERTIFICATION PROCEDURES FOR PRODUCTS AND PARTS

subpart c - PROVISIONAL TYPE CERTIFICATES

21.77 - Duration.

  (a) Unless sooner surrendered, superseded, revoked, or otherwise terminated, provisional type certificates and amendments thereto are effective for the periods specified in this section.

  (b) A Class I provisional type certificate is effective for 24 months after the date of issue.

  (c) A Class II provisional type certificate is effective for twelve months after the date of issue.

  (d) An amendment to a Class I or Class II provisional type certificate is effective for the duration of the amended certificate.

  (e) A provisional amendment to a type certificate is effective for six months after its approval or until the amendment of the type certificate is approved, whichever is first.

[Doc. No. 5085, 29 FR 14566, Oct. 24, 1964 as amended by Amdt. 217, 30 FR 14311, Nov. 16, 1965]