FORT WORTH, Texas (AP) _ An American Airlines flight leaving Dallas-Fort Worth International Airport turned around and made an emergency landing Sunday after a smoky odor filled the cabin, an airline official said.

The plane was headed to Fort Lauderdale, Fla., when it took off Sunday evening at about 5:15 p.m. It returned to DFW Airport about 10 minutes later, American spokesman Tim Smith said.

The flight had 129 passengers aboard. Nobody was hurt.

The MD-80 is being inspected, but mechanics believe oil leaked onto the plane's auxiliary power unit, causing the smoky odor to enter the plane's ventilation system, Smith said.

The Fort Worth, Texas-based airline says Sunday's problem is not related to inspections of wiring bundles on MD-80 jets that led the company to cancel hundreds of flights this week. Those planes have since been cleared to fly, Smith said.

It was the second time in the last few days an American flight had to land after a smoky smell filled the cabin. A Chicago-bound American flight made an emergency landing Friday in West Palm Beach, Fla.

Information from The Dallas Morning News:

Copyright 2008 The Associated Press.