INDIANAPOLIS -- The crash that killed Tony Renna at Indianapolis Motor Speedway might have been caused by driver error, according to an IRL report.

The Indy Racing League, which released its findings Friday, based the report on computer data from a recorder mounted in the side of the car.

Renna lost control of his car, went airborne and crashed while testing for his new team Oct. 22. Taking his first laps with Ganassi Racing, Renna was clocked at 227 mph just before the crash in the third turn on the 2½-mile oval.

The IRL report concluded that there likely was no mechanical failure. But the report said that some sort of mechanical failure could not be completely ruled out. The IRL later issued a news release explaining that the league did not identify driver error as the cause of the crash but that the exact cause of the accident could not be pinpointed.

"The list of items on a car that can fail, and that aren't monitored by sensors, is significant," said Brian Barnhart, IRL senior vice president of racing operations. "Several of those failures could cause a crash. In addition, unforeseen factors can also come into play and contribute to the cause of the accident."

The report said Renna apparently tried to correct the steering wheel after losing control and the car skipped sideways over the infield grass and became airborne.

Renna's car rotated in the air, and its bottom struck a fence support post above the 4-foot-high wall. The impact split the cockpit area.

The crash occurred during the early minutes of a private testing session, and few people were on the scene. The private test session was closed to the public and the media, so there was no videotape or photographs of the crash.

Renna's Target Chip Ganassi team also had a research data device on board. The device, which was damaged in the crash, had to be sent to the manufacturer for data retrieval, and that information was returned to the IRL to be analyzed. The device contains all suspension-related information.