Air Force Faces $14 Billion Parts Hole That Money Alone Cannot Fix

The U.S. Air Force has a $14 billion “hole” in spare parts, according to Lt. Gen. Linda Hurry, commander of Air Force Materiel Command, the organization responsible for supporting the service’s aircraft. Her remarks, reported during an Oct. 21 Mitchell Institute event, connect the shortage directly to aircraft availability: without the required parts, maintainers cannot return jets to ready status.

The figure is striking, but it is not yet a complete diagnosis. The publicly available account does not define the $14 billion as a current inventory deficit, a multiyear purchasing requirement, unfunded demand or the cost of filling every projected need. That accounting basis is essential for measuring the shortage and determining how much additional funding would translate into usable parts.

Hurry described two separate requirements: obtaining money for spares and then getting those spares onto shelves and out to mechanics. That second step is why funding alone cannot close the operational gap. A funded order still has to pass through contracting, production, quality control, transportation and, for repairable components, the depot overhaul system.

Why a funded part can still be unavailable

A 2001 Government Accountability Office review provides a useful, though explicitly historical, map of how aircraft end up waiting. Examining 75 scarce parts for the E-3 surveillance aircraft, C-5 transport and F100-220 engine, investigators found that shortages rarely had one cause.

Demand exceeded forecasts for 26 of the 75 parts. Repair-facility changes affected 22, production problems affected 18, component reliability affected 16 and contracting issues affected 10. Some parts appeared in multiple categories. In one extreme forecasting miss, anticipated quarterly demand for an engine bolt was 828, but actual demand exceeded 12,000.

Other examples show why appropriated money does not instantly become serviceable inventory. A contractor made enough C-5 visor seals, but they failed to meet design tolerances. Some components could not be repaired because facilities lacked capacity, test equipment or smaller consumable parts. Contract negotiations and missed delivery dates also left required items unavailable.

Those findings do not identify the causes of the present $14 billion hole, but they establish the questions needed to test it. Investigators and lawmakers would need current data on backorders, supplier delivery times, repair queues, quality rejections and aircraft classified as unavailable for supply reasons. Without that breakdown, one large dollar figure combines problems that require very different remedies.

Depots also face a workforce constraint

The current sustainment system has a documented labor gap. Hurry said the Air Force Sustainment Center is about 2,600 positions short, while Materiel Command has approximately 8,200 vacant positions across maintenance, engineering, contracting and other specialties. A component cannot move through overhaul merely because replacement material has been purchased; qualified workers, tooling and test capacity must also be available.

This helps explain why jets can sit without parts even when a usable component may exist somewhere in the wider system. The part may be awaiting repair, held behind a higher-priority job, in transit or dependent on another unavailable item. Maintainers can remove a working component from one aircraft to return another to service, but historical GAO work found that this creates additional labor because the donor aircraft must subsequently be restored.

The Air Force is applying newer forecasting tools to the problem. Hurry said its Predictive Analytics and Decision Assistant supports predictive maintenance, while quantum-optimization work is being used to select parts for purchase or repair across the supply chain. Better forecasts could position components before predicted failures and make better use of limited maintenance hours. Their practical value will depend on data quality and whether suppliers and depots can respond to the resulting demand signal.

A larger fleet will widen the test

The pressure is not confined to existing aircraft. The Air Force plans to field 500 Collaborative Combat Aircraft uncrewed aircraft intended to operate with newer crewed fighters by 2032. Hurry said the service is only beginning to develop their sustainment framework, including the supply chain and lower-tier suppliers needed to support them.

That early planning offers an opportunity to avoid embedding today’s shortages in a new fleet. It also raises the stakes: the Air Force must fund missing parts for aging aircraft while hiring depot workers, increasing repair throughput and preparing suppliers for hundreds of additional airframes. Until the service defines what sits inside the $14 billion figure, the number measures the scale of the concern more clearly than it identifies the fix.

By David Whitaker — Associate editor for AMI’s aerospace and drone systems desk, translating flight systems, aircraft programs, spaceflight, and UAV developments into accessible technical stories.