• A Frontier Airlines plane appeared to lose a wheel after a "hard landing" in San Juan on Tuesday.
• One passenger told a Puerto Rican newspaper they were left "traumatized" by the incident.
• Frontier said it had offered passengers $500 vouchers and refunds for the flight.

Frontier Airlines said it had offered $500 vouchers and refunds to passengers following what it called a "hard landing" in Puerto Rico on Tuesday night.

Flight 3506 from Orlando briefly touched down at San Juan's Luis Muñoz Marín International Airport before pilots performed a go-around due to an apparent mechanical issue.

Flight tracking data showed that the two-year-old Airbus A321neo then circled over San Juan several times before finally landing.