WEST PALM BEACH, Fla. --A Chicago-bound American Airlines jet had to turn around after takeoff and return to West Palm Beach, Florida. Passengers reported smelling smoke inside the cabin of the MD-80 aircraft right after it took off around 7:30 a.m. Friday. The airline says the problem is not related to the inspections of wiring bundles that caused hundreds of MD-80 flight cancelations earlier this week. Maintenance crews were checking the plane. There were 145 people on board. No one was injured.