A Lockheed Martin helicopter plant in Coatesville, Pa., is staying open after President Trump urged its chief executive, Marillyn Hewson, not to close it as planned.

“At the request of President Trump, I took another look at our decision to close the Coatesville, PA facility and have decided to keep it open while we pursue additional work,” Ms. Hewson said in a statement on Wednesday.

The president tweeted in approval of the decision, calling Lockheed Martin one of the “truly great companies” in the United States. “We are very proud of Pennsylvania and the people who work there,” he added.

Employees at the Coatesville facility manufacture helicopters for Sikorsky, an aircraft manufacturer that is a subsidiary of Lockheed Martin. It was unclear whether the facility’s shutdown had been postponed indefinitely, and spokeswomen for Ms. Hewson and Lockheed Martin did not immediately respond to requests for comment on Wednesday night.