DALLAS (AP) – American Airlines expects to add more seats to some of its planes, which could mean less leg room for passengers.

The airline’s parent company, AMR Corp., disclosed the move in a regulatory filing Wednesday.

Airline vice president Lauri Curtis says American officials expect to add seats on Boeing 737 and McDonnell Douglas MD-80 jets. But she says they haven’t decided how many seats and how that will affect American’s revenue.

Airlines add seats for the obvious reason — they can sell more tickets that way. But it usually results in less leg room for passengers.

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