The National Transportation Safety Board is investigating the incident.

Passengers aboard the Trump plane said they had plenty of warning of the rough landing to come.

Charlie Cormay of Sudbury said, "When they first said they had problems, everybody was just kind of joking about it. Once we realized there was going to be a crash landing, everybody got pretty solemn."

As the plane came in for its final landing, Cormay said, "a few prayers" went through his mind.

Mike Murphy of Washington, D.C., said the plane was making what seemed to be a normal approach to the airport, "then the pilot announced there was a problem with the landing gear."

"It was no fun to learn we had a landing-gear problem. People kind of looked around. The pilot announced there was a mechanical problem. We went out over the water and did what they call a G-force manuever, it was like a roller coaster. Then we tried to land hard to bounce it free. That didn't work."

Kathy Hussey of Brooklyn, N.Y., who had come to Boston for a business meeting, said, "They prepared us very well. By the time we landed, we were all very happy and relieved."

"Suddenly you were on the runway with foam on your face and on your back," she said, adding that she probably would take the train back to New York.

Passenger Moriarty said many of the travelers were on business, which he credited with the calm atmosphere. "They were thinking of their business appointments," he said. Still, passengers took comfort from each other he said.