An investigation into the crash of a small plane piloted by Harrison Ford concluded that the crash wasn’t the actor’s fault. TMZ.com reports that the National Transportation Safety Board determined that a loose part led to the plane’s engine failure.

“In their report on the March 5 crash, the NTSB said the carburetor’s main metering jet became loose, which likely stemmed from when the plane was rebuilt 17 years earlier,” TMZ reports.

The TMZ report notes that another finding concluded that the shoulder harness Ford was wearing was not properly reinforced, which was a factor in the seriousness of the actor’s injuries.

Ford had reportedly just taken off from Santa Monica Airport in the World War II-era plane when the engine failed. The actor, who has been credited with pulling off a crash landing that could have been much worse, continues to recover from his injuries.