A letter obtained by Reuters revealed that Howmet Aerospace, a supplier for Airbus and Boeing, is considering suspending some shipments in response to the tariffs imposed by U.S. President Donald Trump. The Pittsburgh-based company has invoked force majeure, a legal provision that allows parties to be excused from their contractual obligations due to unforeseen external circumstances. In the letter to customers, Howmet stated that it may not be able to provide products or services affected by the tariffs and the declared national emergency. This decision could have implications across the aerospace supply chain. Boeing and Airbus have yet to comment on the letter, which was sent to various firms in the aerospace industry. The move by Howmet could result in disputes over cost-sharing and ripple effects throughout the supply chain. The aerospace sector has been grappling with increased costs from tariffs on aluminum, steel, and anticipated duties on imports from other countries. Trump's announcement of tariffs, ranging from 10% to 50%, has heightened uncertainty in the market and raised concerns about a potential recession. Despite the potential challenges, aerospace companies are expected to challenge Howmet's use of force majeure, with the outcome depending on the unpredictability of the tariffs and Trump's campaign statements on the issue.