Delta Air Lines Flight 56 landed safely at the Minneapolis-St. Paul International Airport shortly before 8 p.m. local time Wednesday, the airline said. The flight was operating on an Airbus A33-900 with 275 passengers and 13 crew members on board.

Some passengers were terrified, convinced the plane was going down. One seasoned traveler said it was the roughest flight he’d ever taken. A woman on board felt like she was experiencing an earthquake.