News reports that he had been instructed to land on runway 20-L at John Wayne Airport, but mistakenly aimed for a taxiway instead.
The incident has sparked an FAA investigation, since the taxiway landing is a violation of safety rules. He flew his single engine Aviat Husky over an American Airlines 737 loaded with passengers and then landed on the taxiway.
Ford, 74, was piloting his single-engine plane when tower control gave him the go-ahead to land at John Wayne Airport in Orange County, California.
Star Wars actor Harrison Ford is under investigation by aviation authorities after he was involved in a "potentially serious" incident while flying his private plane, according to reports.
The passenger plane reportedly departed safely minutes later. Air traffic controllers informed Ford that he had landed on a taxiway rather than the runway, NBC said. In the process, he passed over a 737 carrying 116 people, and reportedly asked the air traffic controller: "Was that airliner meant to be underneath me?"
The Federal Aviation Administration is investigating the incident.
He was piloting a small World War II era-plane when he crashed at a city golf course in Venice.
He also downed a helicopter in 1999 during a training session. And in 2000, his Beechcraft Bonanza slightly scraped the runway during an emergency landing at Nebraska's Lincoln Municipal Airport. Ford had just taken off from nearby Santa Monica Airport and requested a return before the aircraft crashed, and the spokesperson had said his injuries were not life-threatening.