Harrison Ford was "battered but OK" Thursday after his vintage World War II training plane lost engine power and crash-landed on a California golf course, authorities and family members said. The 72-year-old actor, who was conscious and breathing when rescue crews reached him, was stabilized and taken to a hospital, where he was in fair to moderate condition, authorities said. Sources familiar with the incident told NBC News that Ford slammed into the plane's console and control stick and that he underwent surgery Thursday night. He suffered a broken arm and a nasty gash to his head, among other injuries, they said.

Ben Ford, the well-known restaurateur and the actor's son, said on Twitter that his dad was "battered, but OK" after the crash, which happened about 2:20 p.m. (5:20 p.m. ET).

The plane, a single-engine Ryan Aeronautical ST3KR, crashed on the golf course shortly after takeoff from Santa Monica Airport, said Patrick Jones, an investigator for the National Transportation Safety Board. The pilot reported a loss of engine power, clipped the top of a tree and was trying to return to the airport, Jones said. "I'm sure the pilot was glad there was a golf course here," he said.