The United States has escalated tensions with Canada by threatening steep tariffs and possible decertification of Canadian-built aircraft, citing Ottawa’s delay in approving Gulfstream business jets. Aviation experts warn that politicizing aircraft certification could undermine global safety cooperation and disrupt North America’s tightly integrated aerospace industry.
In a dramatic escalation of trade tensions between the United States and Canada, U.S> President Donald J. Trump has warned that he will impose steep tariffs on Canadian-made aircraft and “decertify” them for use in the U.S. unless Ottawa moves swiftly to approve several advanced business jets produced by American manufacturer Gulfstream Aerospace.
Trump’s announcement, made via social media on Thursday, threatens a 50 % tariff on all aircraft imported from Canada and the revocation of U.S. regulatory certification for Canadian planes, including those built by major aerospace firm Bombardier.
What’s at the Center of the Dispute
At issue are the certifications of Gulfstream’s latest business jet models — primarily the Gulfstream G500, G600, G700 and G800 — which Trump says Canadian regulators have “wrongfully and illegally” failed to approve for operation in Canada despite certification by both the U.S. Federal Aviation Administration (FAA) and the European Union’s aviation safety authority.
Under longstanding international aviation regulatory practice, the country where an aircraft is designed — in this case the U.S. for Gulfstream — grants the primary type certificate. Other countries typically validate that decision. Canada’s hesitation has become the flashpoint, with the Trump administration framing it as a trade barrier rather than a safety review.
Threat of Decertification and Tariffs
Trump’s declaration states that Bombardier Global Express jets — iconic long-range business aircraft — and other Canadian aircraft will lose U.S. certification unless Canada approves the Gulfstream jets. If unresolved, exporters could face a 50 % tariff on all aircraft sold into the U.S. market.
This approach would upend standard regulatory norms. Aviation experts note that aviation safety authorities typically only revoke certification on concrete safety grounds — not as leverage in trade disputes — and the FAA’s legal authority to decertify aircraft for economic reasons is highly questionable.
Bombardier, which employs thousands in the U.S. and whose jets are widely used by U.S. carriers and operators, said it was in contact with the Canadian government and hopes for a swift resolution.
Economic and Industry Impact
Canada’s aerospace sector is a major contributor to its economy, generating tens of billions in GDP and supporting hundreds of thousands of jobs. The U.S. relies heavily on Canadian aircraft — from business jets to regional aircraft and helicopters — with more than 5,000 Canadian-built planes registered in the United States.
Airlines such as American Airlines and Delta Air Lines depend on regional jets manufactured in Canada for feeder services across the U.S., meaning grounding or tariff barriers could ripple through North American air transport networks.
Industry analysts warn that politicizing certification could weaken the integrity of global aviation safety cooperation and create incentives for other countries to retaliate, destabilizing civil aviation supply chains and safety frameworks.
Broader Trade Relations at Stake
The threat adds a new layer to an already tense U.S.–Canada relationship. In recent days, Canadian Prime Minister Mark Carney publicly criticized what he called economic coercion, signaling Canada’s intent to diversify trade partnerships beyond the United States.
Earlier, Trump also threatened tariffs tied to Canada’s broader trade policy decisions, including a clash over a proposed Canada-China trade deal.
Historical Context
This is not the first time aerospace trade issues have flared between the two allies. During Trump’s first administration, the U.S. imposed duties on Boeing’s complaint against Bombardier over alleged subsidies for CSeries aircraft — duties later overturned — illustrating how aerospace has long been an arena for trade friction.
What’s Next
Both Ottawa and Bombardier have indicated ongoing discussions, but Canadian officials have not publicly backed down on the certification process. Experts anticipate that the disagreement could land before bilateral trade panels or international arbitrators if unresolved.
As the FAA and Transport Canada navigate regulatory standards and trade policy pressures, the outcome could reshape how aviation certification is treated in future trade disputes — with implications not just for North America, but for global aerospace cooperation.
