14 CFR 21.99 - Required design changes.

§ 21.99 Required design changes.
(a) When an Airworthiness Directive is issued under Part 39 the holder of the type certificate for the product concerned must—
(1) If the FAA finds that design changes are necessary to correct the unsafe condition of the product, and upon his request, submit appropriate design changes for approval; and
(2) Upon approval of the design changes, make available the descriptive data covering the changes to all operators of products previously certificated under the type certificate.
(b) In a case where there are no current unsafe conditions, but the FAA or the holder of the type certificate finds through service experience that changes in type design will contribute to the safety of the product, the holder of the type certificate may submit appropriate design changes for approval. Upon approval of the changes, the manufacturer must make information on the design changes available to all operators of the same type of product.
[Doc. No. 5085, 29 FR 14567, Oct. 24, 1964, as amended by Amdt. 21-3, 30 FR 8826, July 24, 1965]

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