A former United Technologies Corp. engineer was charged in the U.S. with attempting to take sensitive data about military aircraft design to China.

Yu Long, a Chinese citizen who appeared today in federal court in Bridgeport, Connecticut, was arrested Nov. 7 after trying to fly to China with test results for titanium, which is used in military aircraft, taken from a “major defense contractor,” prosecutors said in a statement.

Long was flying to China on Nov. 5, when his luggage was searched during a layover at Newark Liberty International Airport in New Jersey. The search turned up documents about titanium, prosecutors said.

Long’s employer was identified as “Company A” in the complaint detailing the charges against him. A person familiar with the case who asked not to be identified because the matter isn’t public said it was Hartford, Connecticut-based United Technologies.

Long is charged with illegal transportation of stolen or fraudulently obtained goods. If convicted, he faces as long as 10 years in prison and a fine of $250,000, prosecutors said.

“UTC is fully cooperating with the government’s investigation,” the company, a maker of jet engines and air conditioners, said in a statement. “Because it is an ongoing investigation, we have no comment at this time.”