14 CFR 21.613 - Duration.

§ 21.613 Duration.
(a) A TSO authorization or letter of TSO design approval is effective until surrendered, withdrawn, or otherwise terminated by the FAA.
(b) If a TSO is revised or canceled, the holder of an affected FAA letter of acceptance of a statement of conformance, TSO authorization, or letter of TSO design approval may continue to manufacture articles that meet the original TSO without obtaining a new acceptance, authorization, or approval but must comply with the requirements of this chapter.

Title 14 published on 2014-01-01

no entries appear in the Federal Register after this date.

Title 14 published on 2014-01-01

The following are ALL rules, proposed rules, and notices (chronologically) published in the Federal Register relating to 14 CFR 21 after this date.

  • 2014-02-27; vol. 79 # 39 - Thursday, February 27, 2014
    1. 79 FR 11004 - Changes to Production Certificates and Approvals
      GPO FDSys XML | Text
      DEPARTMENT OF TRANSPORTATION, Federal Aviation Administration
      Notice of proposed rulemaking (NPRM).
      Send comments on or before May 28, 2014.
      14 CFR Parts 21 and 45