Opinion: A vanished F-35 canopy exposes a supply chain nobody actually controls

On September 22, Australia's defence minister, Richard Marles, told reporters in Adelaide what officials in Canberra, Washington and at Lockheed Martin had spent weeks trying to manage quietly: a shipment of F-35 components sent from Australia for repair in the United States had instead turned up in Hong Kong, and nobody could yet say how. Marles confirmed the diversion but moved immediately to reassure the public that the missing items were not sensitive. Reporting since has made that reassurance harder to sustain: the shipment reportedly included an F-35 canopy, whose coating incorporates the radar-absorbent technology central to the aircraft's stealth profile, along with a weapons-bay door. Chinese authorities in Hong Kong are now understood to hold the components.

The Pentagon's F-35 Joint Program Office has confirmed it is "actively working with U.S. authorities and industry partners to retrieve these components, investigate the incident, and place safeguards to avoid a future occurrence." Lockheed Martin, which used a third-party commercial carrier to move the unserviceable parts, says it manages every shipment with rigorous safeguards. Australia's government says it is examining "everything that has occurred at the Australian end." Congress is not waiting for those internal reviews to finish: the House Armed Services Committee has opened its own inquiry into the episode, and staff have already received multiple classified briefings from the Pentagon and the State Department.

All of this is being narrated, understandably, as a scandal about one shipment. It is not. It is the latest data point in a problem the U.S. government's own auditors have been documenting for years: the F-35 enterprise, spread across roughly twenty countries and thousands of suppliers, has never built a reliable system for knowing where its own hardware is.

This has happened before, at industrial scale

In 2023, the Government Accountability Office examined how the F-35 program tracks the "global spares pool" — the shared inventory of parts that keeps allied fleets flying. It found that a prime contractor had lost track of more than one million spare parts, valued above $85 million, between 2018 and 2022, and that the Pentagon's own program office had reviewed less than two percent of those losses before GAO went looking. A separate tranche of roughly 940,000 parts, worth about $66 million, sat unreported at non-prime contractor facilities worldwide. None of that involved classified stealth components crossing into a jurisdiction administered by Beijing. It was, instead, a mundane finding about accounting: the government that owns the aircraft did not have visibility into where the aircraft's pieces actually were once they left a depot. Aviation trade press covered the finding at the time as a bookkeeping embarrassment. In hindsight it reads as a warning.

A newer GAO review, published this past June, updates the picture and it is not improving. Fleet-wide mission-capable rates fell from 67 percent in fiscal year 2021 to 44 percent in fiscal year 2025, and GAO attributes much of the decline to the same root causes as before: slow depot repair and an inability to reliably procure and track parts. A program under that much sustainment strain, run through a dense web of contractors and subcontractors, is structurally more likely to lose custody of a shipment than one with tight, verified logistics. The Hong Kong diversion is not an anomaly inside that system. It is close to the expected output of it.

Hong Kong was not a random wrong turn

What makes this specific diversion harder to wave off is where it ended up. The United States does not treat Hong Kong, for export-control purposes, as separate from mainland China. The Commerce Department's Bureau of Industry and Security suspended Hong Kong's differential export-license treatment in 2020, folding it into the same restrictive framework applied to the PRC, explicitly because Beijing's national security law over the territory had raised the risk that controlled U.S. technology routed there would be diverted to unauthorized destinations or end users. That determination was made for exactly this scenario. Defense contractors handling F-35 hardware are separately bound by federal acquisition rules — including the clause requiring compliance with export-control law for controlled items — that assume shippers know, and can prove, where a part is at every point in transit. A canopy with stealth coating drifting into Hong Kong is not a gap in an obscure regulation. It is the precise failure the post-2020 policy was written to prevent, occurring anyway inside a supply chain the government does not fully see.

"My understanding is that there is a sense of comfort, that we're not talking about sensitive equipment here, or sensitive parts."

That was Marles' assessment in Adelaide. It may turn out to be accurate; Lockheed and the Joint Program Office have offered similar reassurance. But "not sensitive" is doing a great deal of work in that sentence, and it is being asserted by the same institutional chain — contractor and program office — that GAO has twice found could not reliably tell Congress what had gone missing or how much it was worth. Independent defense analysts quoted this week have made the more basic point: an aircraft with thousands of distinct components has parts of wildly varying sensitivity, and a public assurance delivered before an investigation is complete is a political judgment, not a technical one.

What should actually follow

The reasonable conclusion is not that China now possesses the secret to American stealth technology; canopy coatings degrade and are not, by themselves, the sum of the F-35's low-observable design. The reasonable conclusion is narrower and more uncomfortable: the F-35 sustainment enterprise has spent three years failing an accountability test that GAO keeps administering, and the fix each time has been another promise of "safeguards to avoid a future occurrence" rather than a structural change to how shipments are tracked, audited and routed. A program office that cannot account for a million parts is not equipped to guarantee, in real time, that a single package will not be rerouted through a jurisdiction the United States itself has designated as high-risk.

• More than 1 million F-35 spare parts, worth over $85 million, went unreconciled by a prime contractor between 2018 and 2022, per GAO.
• Fleet-wide mission-capable rates fell from 67 percent to 44 percent between fiscal 2021 and fiscal 2025.
• Hong Kong has been subject to the same export-control restrictions as mainland China since 2020, specifically over diversion risk.

Congress has the leverage here that reassurance from Adelaide or Bethesda does not. The House Armed Services Committee's inquiry should not close with a briefing that confirms the missing canopy was low-value; it should produce binding chain-of-custody requirements for F-35 shipments moving through commercial carriers, independent verification of the global spares pool GAO has now flagged twice, and a public accounting of how a package bound for the United States ended up, however briefly, in the hands of Chinese customs officials. A program this expensive, this widely shared among allies, and this central to American airpower does not need another statement that the damage was contained. It needs proof that the next shipment cannot be lost the same way.