Finnish broadcaster Yle reports the jet was halted mid-journey after its onboard diagnostic system flagged a possible electronic fault during engine startup.
The proposed sale, which still requires congressional approval, comes as Saudi Arabia seeks U.S. support in its conflict with Yemen's Houthi movement, according to Al Jazeera.
The proposed package includes 48 F-35 fighter jets and 49 engines, according to a notification sent to Congress.
Analysts cited by The New York Times say Beijing could gain access to sensitive fighter jet technology through espionage or military ties with Riyadh.
Israeli media reports say Tel Aviv plans to request advanced weapons systems previously withheld by Washington, following news of a potential US sale of F-35 jets to Saudi Arabia.
A shipment of F-35 components being sent from Australia to the United States for repairs was diverted while crossing the Pacific, according to a report by Politico.
Washington's approval of the stealth jet deal comes despite past Israeli objections to Riyadh acquiring the aircraft.
Riyadh has pushed for years to acquire the advanced fighter jet, but the potential deal is raising questions in Washington, according to BBC News.
Lockheed Martin delivers the first of nearly three dozen stealth fighters ordered by Berlin four years ago, as NATO allies increase defense budgets.
Iranian state media cited a Pentagon inspector general report saying a U.S. stealth F-35 fighter jet was hit and damaged during the conflict with Iran.