American Airlines mechanics will fix floor mounts in 48 of its 757s to prevent seats from coming loose, the airline said Thursday.

ngineers figured out "additional preventative steps" to upgrade the mechanism that locks the seats to the floor, an American Airlines news release said.

The carrier said 50 Thursday flights were canceled and 44 on Friday would likely be scrubbed because of the work, which is scheduled to be finished by Saturday.

Three American planes had seats come loose while in flight, including a New York to Miami flight on Monday morning.

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