A pilot of an American Airlines flight makes an emergency call to air traffic control before landing in Philadelphia after an alleged incident involving another passenger. According to reports, the man on board is described as having a medical emergency, after which he allegedly bites a fellow passenger. Accounts also say the situation escalates, with the man reportedly trying to fight people onboard. The pilot contacts air traffic control ahead of landing to manage the emergency and coordinate with authorities on the ground. The reports do not provide additional verified details about the man’s condition, the circumstances leading up to the alleged biting, or the condition of the passenger who was bitten. The incident is reported to have occurred during the flight, with the emergency prompting the pilot’s communication with air traffic control prior to arrival at Philadelphia. Further information, including official statements from the airline, airport, or law enforcement, is not included in the provided summaries.