14 CFR 21.99 - Required design changes.

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There are 4 Updates appearing in the Federal Register for 14 CFR Part 21. View below or at eCFR (GPOAccess)
§ 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 2015-11-17

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

  • 2016-12-30; vol. 81 # 251 - Friday, December 30, 2016
    1. 81 FR 96572 - Revision of Airworthiness Standards for Normal, Utility, Acrobatic, and Commuter Category Airplanes
      GPO FDSys XML | Text
      DEPARTMENT OF TRANSPORTATION, Federal Aviation Administration
      Final rule.
      Effective August 30, 2017.
      14 CFR Parts 21, 23, 35, 43, 91, 121, and 135
The section you are viewing is cited by the following CFR sections.

Title 14 published on 2015-11-17.

The following are only the Rules published in the Federal Register after the published date of Title 14.

For a complete list of all Rules, Proposed Rules, and Notices view the Rulemaking tab.

  • 2016-12-30; vol. 81 # 251 - Friday, December 30, 2016
    1. 81 FR 96572 - Revision of Airworthiness Standards for Normal, Utility, Acrobatic, and Commuter Category Airplanes
      GPO FDSys: XML | Text
      DEPARTMENT OF TRANSPORTATION, Federal Aviation Administration
      Final rule.
      Effective August 30, 2017.
      14 CFR Parts 21, 23, 35, 43, 91, 121, and 135