United States Air Force Aircraft Fleet Retention Trends

This report provides historical contextual information on the ages of aircraft designs operated by the Air Force. The authors find that, since the end of World War II, there has been a consistent trend for the Air Force to keep aircraft designs in operation for ever-longer periods. While the mean age of aircraft designs currently in operation is at an all-time high, this has been true throughout the history of the Air Force.

2011 Updated Reprint. Updated Annually. US Aviation and Aerospace Industry Handbook Volume 1 BASIC TRENDS AND REGULATIONS

Over the next 20 years, the further aging of already-old aircraft will introduce challenges and issues for aircraft operators. The technical challenges relate to structures, propulsion, and systems. The institutional challenges include limitations on independent verification of fleet status and future condition and on information needed for engineering analyses including risk assessment, and an overall scarcity of resources.