Work Item
ASTM WK78199

New Practice for Determining Safe-Life, Inspection Threshold and Recurring Inspection Intervals

1. Scope

This practice provides guidance to determine safe-life, inspection threshold, and inspection intervals to be published in the airworthiness section of the maintenance manual in order to maintain continued airworthiness. The guidance materials presented herein are based on cyclic test, damage tolerance test, fatigue analysis, and/or damage tolerance analysis. The material was developed through open consensus of international experts in general aviation. The information was created by focusing on Levels 1, 2, 3 and 4 Normal Category aeroplanes. The content may be more broadly applicable; it is the responsibility of the applicant to substantiate broader applicability as a specific means of compliance.


Damage Tolerance; Factor; Fatigue; Inspection; Recurring; Safe-life; Scatter Factor; Threshold


This Standard Practice provides one means for determining safe-life, inspection threshold, and/or recurring inspection intervals as a result of aeroplane durability and damage tolerance assessments. This information can be used in conjunction with F3115.

The title and scope are in draft form and are under development within this ASTM Committee.


Developed by Subcommittee: F44.30

Committee: F44

Staff Manager: Joe Koury

Work Item Status

Date Initiated: 08-31-2021

Technical Contact: A. K. M. Haque

Item: 003

Ballot: F44.30 (22-02)

Status: Negative Votes Need Resolution