Because of projected reductions in future defense budgets, less money will be available for new aircraft acquisitions. Consequently, many of the current aircraft will have to be maintained well into the twenty-first century. As they continue to age, the time-dependent effects of material degradation, due to corrosion, will become more significant. Having to maintain aircraft three to four times their original design life presents a unique new set of complex technical problems and challenges. The primary concern is the reduction of airframe fatigue life and static strength due to widespread corrosion damage, fatigue, embrittlement, material loss due to corrosion, intergranular corrosion attack, fretting and stress concentrations. In an effort to ensure continued airworthiness and flight safety, an aggressive program plan has been developed and implemented at Tinker AFB to try to solve the corrosion problems and fatigue related problems to present the occurrence of catastrophic structural failures. The program consists of (1) invasive disassembly of a complete C/KC-135 and sections of B-52 and Boeing 707 aircraft, (2) corrosion documentation/information system development, (3) analysis and testing the effects of corrosion on structural integrity, as well as corrosion growth rates, (4) corrosion modeling and development of C/KC-135 service life extension strategies, (5) and comprehensive evaluation of nondestructive inspection/testing (NDI/NDT) equipment for hidden corrosion detection and quantification. This program has been extensively coordinated with USAF Wright Labs, AFOSR, Naval Air Warfare Center, FAA Aging Aircraft Center, NASA Langley, industry and academia.


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    Oklahoma City Air Logistics Center (USAF) Aging Aircraft Corrosion Program

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