According to TMZ, Harrison Ford is now in the clear and the FAA has officially ended their investigation after requiring Ford to complete training.
According to TMZ who originally broke the story, the FAA confirmed that Harrison was required to take a "remedial runway incursion training course."
After completing the course the FAA closed his case.
The incident that sparked the investigation occurred at Hawthorne Airport in April when Harrison was told by the operator to hold. When Harrison crossed without authorization, it could have ended badly, as another plan was on the runway at the time.