CHICAGO (CBS) — American Airlines is still canceling dozens of flights, as it scrambles to repair seats in its Boeing 757 jets.

The airline says the seats can pop loose during flight.

A total of 44 flights are canceled Friday and 50 were canceled yesterday.

The problem first surfaced last weekend–when a row of seats in the cabin of a plane popped loose during flight.

Then it happened again two more times. None of the flights was connected to Chicago, but American does have a huge presence at O’Hare International Airport.

American originally said the problem was due to a clamp.

But now it says it’s a combination of wear and poor design.

A total of 48 jets are grounded. But the airline says they should be up and running by Saturday.

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