BOSTON (WHDH) -- A second plane bound for Miami was grounded late Monday because some of the seats became loose during flight -- just two days after Flight 685 out of Logan Airport took off with 181 people on board, and was forced to make an emergency landing at JFK Airport in New York.

American Airlines released a second statement Monday saying, “An initial internal investigation into why a row of seats became loose on two American Airlines Boeing 757s has indicated that there could be a possible issue with a certain model of seats and how they fit into the tracking used to secure the seats. Out of an abundance of caution, American has decided to proactively reinspect eight 757s today that could possibly have this same issue.”

“That’s crazy, I definitely wouldn't want to be on that airplane," said Tanner Brown, a passenger.

Lucky for Brown, he wasn't on the plane when a row of three seats became unbolted from the floor, forcing passengers to be moved to other seats, and then eventually seated on another aircraft to continue its flight to Miami.

“I’m sure everything will be fine. I'm sure the chances of that happening are one in a million," Vicki Kane, a passenger.

But the fact that it happened at all has been nerve wracking for passengers and terrible public relations for the airline already mired in bankruptcy and labor issues. 

American Airlines issued a statement saying, “We are conducting an internal investigation to determine why the row of seats became loose…the FAA is aware of our internal review and that safety is our top priority."

Sources told 7News they believe the jet in question is one of many 757's the airline is refurbishing and that a worker simply forgot to tighten the four bolts used to hold down the triple-seat row. The work was done by a subcontractor hired by the airline.

Still, several passengers say they'll think twice about flying American Airlines because the unbolted seats have unnerved them and raised a lot of red flags.

“Well if you're note bolting down seats, something as small as that, what is the quality of your airplane?" said LaToya Martin, a passenger.

The airline has flown inspectors from its offices in Tulsa, Oklahoma to New York City to investigate the problem.