14 CFR 21.99 - Required design changes.

Beta! The text on the eCFR tab represents the unofficial eCFR text at ecfr.gov.
§ 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 2015-01-01

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

  • 2015-10-15; vol. 80 # 199 - Thursday, October 15, 2015
    1. 80 FR 61975 - Final Primary Category Airworthiness Design Standards; AutoGyro USA, LLC (AutoGyro) Model Calidus Gyroplane
      GPO FDSys XML | Text
      DEPARTMENT OF TRANSPORTATION, Federal Aviation Administration
      Issuance of final Airworthiness Design Standards.
      These airworthiness design standards are effective November 16, 2015.
      14 CFR Part 21
The section you are viewing is cited by the following CFR sections.