Flight Standards Service

Draft Advisory Circulars (ACs) Open for Comment

Subscribe to this page to begin receiving email notifications when updates and additions are made.

Latest entries are at the bottom of this list of Document Titles.

Document Title: AC 121-22D, Maintenance Review Boards, Maintenance Type Boards, and Original Equipment Manufacturer/Type Certificate Holder Recommended Maintenance Procedures
Summary: This AC provides information that industry may use to develop and revise the minimum scheduled maintenance tasking/interval requirements for derivative or newly type-certificated aircraft and powerplants for Federal Aviation Administration (FAA) approval.
References:

Title 14 of the Code of Federal Regulations (14 CFR)

  • Part 1, Definitions and Abbreviations.
  • Part 21, Certification Procedures for Products and Articles.
  • Part 23, Airworthiness Standards: Normal Category Airplanes.
  • Part 25, Airworthiness Standards: Transport Category Airplanes.
  • Part 26, Continued Airworthiness and Safety Improvements for Transport Category Airplanes.
  • Part 27, Airworthiness Standards: Normal Category Rotorcraft.
  • Part 29, Airworthiness Standards: Transport Category Rotorcraft.
  • Part 33, Airworthiness Standards: Aircraft Engines.
  • Part 35, Airworthiness Standards: Propellers.
  • Part 43, Maintenance, Preventive Maintenance, Rebuilding, and Alteration.
Documents for Download: Draft Document (PDF)
Draft Document Comment Grid (MS Word)
Comments Due: December 29, 2023
How to Comment: Email comments

Related Information

Last updated: Wednesday, November 29, 2023