Skip to page content

USA Banner

Official US Government Icon

Official websites use .gov
A .gov website belongs to an official government organization in the United States.

Secure Site Icon

Secure .gov websites use HTTPS
A lock ( ) or https:// means you’ve safely connected to the .gov website. Share sensitive information only on official, secure websites.

Site Notification

Site Notification

United States Department of TransportationUnited States Department of Transportation

AC 33.70-1 - Guidance Material for Aircraft Engine Life-Limited Parts Requirements

Document Information

Guidance Material for Aircraft Engine Life-Limited Parts Requirements
Date issued
Office of Primary Responsibility
AIR-600, Policy and Innovation Division

This advisory circular (AC) provides definitions, guidance, and acceptable methods, but not the only methods, that may be used to demonstrate compliance with the engine life-limited parts integrity requirements of § 33.70 of Title 14 of the Code of Federal Regulations (14 CFR part 33). Section 33.70 contains requirements applicable to the design and life management of propulsion system life-limited parts including high-energy rotating parts.