Depends on if it was interference or assult
Penalties
Assault. Assaulting a crewmember is punishable by up to 20 years’ imprisonment, and a fine of up to $250,000. If a dangerous weapon is used, the defendant can be imprisoned for life.
(18 U.S.C. § 3571, 49 U.S.C. § 46504.)
Interference. The maximum civil penalty for interfering with a crewmember is a fine of up to $25,000. (49 U.S.C. § 46318.)
To impose a fine, the FAA files a notice of a proposed civil penalty. The passenger can request a hearing, which will be held before a federal Administrative Law Judge (ALJ). Usually, both the FAA and the passenger are allowed to present evidence, and the passenger can (and should) be represented by an attorney. After a hearing, the judge announces his or her decision, and sometimes issues a written decision. If either the passenger or the FAA requests review, the FAA Administrator reviews the judge’s decision. Either party may then appeal the Administrator’s decision by filing an appeal in a Federal Court of Appeals.