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GAO Report: Navy, Air Force Declining Aircraft Mission Capable Rates

The following is the June Government Accountability Office report, Air Force and Navy Aviation: Actions Needed to Address Persistent Sustainment Risks.

From the report

What GAO Found 

Mission capable rates—a metric used to assess the health and readiness of an aircraft fleet—and other related maintenance metrics trends have worsened since fiscal year 2015 for eight selected aircraft.

While the Air Force and Navy have initiatives to address unit-level maintenance challenges, neither service has mitigated persistent fixed-wing aircraft sustainment risks. A statute enacted in 2016 requires the services to conduct sustainment reviews for major weapon systems to assess their product support strategy and performance, among other things. GAO found, however, that the Air Force and Navy have not completed these sustainment reviews for all aircraft (see figure). Both the Air Force and Navy have plans to complete the required sustainment reviews by the end of fiscal years 2025 and 2035, respectively.

Without the Air Force and Navy prioritizing the completion of required sustainment reviews and updating their schedules to complete the reviews in a timelier manner, the services are missing opportunities to identify maintenance and other risks to aircraft availability. Further, neither the Air Force nor the Navy have completed mitigation plans to remedy maintenance challenges, risks, or related impacts identified in any sustainment reviews. As a result, the Air Force and Navy cannot fully address unit-level aviation maintenance challenges affecting aircraft availability required for training and operations. If Congress required the Air Force and Navy to submit mitigation plans to Congress related to maintenance challenges and risks to aircraft availability found in sustainment reviews, it would enhance the services’ accountability for taking the necessary and appropriate actions to address persistent challenges to aircraft availability.

Download the document here.