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Engine Component Retirement for Cause: Volume I - Executive Summary

Report Number: AFWAL-TR-87-4069 Volume I
Author(s): John A. Harris, Jr.
Corporate Author: United Technologies Corporation
Laboratory: Materials Laboratory
Date of Publication: 1987-08
Pages: 59
Contract: F33615-80-C-5160
Project: 3993
Task: 399300
AD Number: ADA192730

Abstract:
This program developed and integrated materials behavior characteristics, component life analysis, nondestructive evaluation and cost- risk technology to establish and demonstrate the retirement for cause maintenance concept as it applies to rotating components of military gas turbine engines. As such it provides the basis for elimination of classical time or cyclic life limits currently imposed for retirement of gas turbine rotor components by substituting a life management system in which each individual component is retired from service when the unique, economical safe life of that component is exhausted. The methodology was demonstrated on and validated for the U.S. Air Force F100 engine's rotor components and has been implemented on that engine system by the USAF Air Logistics Command. Use of Retirement for Cause is projected to result in life cycle cost savings in excess of $1 billion for that engine system. The Retirement for Cause methodology developed is generic, and may be applied to not only other gas turbine engines, but to components of any life limited system.

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