Delta MD88 near Milwaukee on Jul 26th 2014, smell of smoke on board

A Delta Airlines McDonnell Douglas MD-88, registration N922DL performing flight DL-1496 from Minneapolis,MN to New York La Guardia,NY (USA) with 145 people on board, was enroute at FL330 about 50nm northwest of Milwaukee,WI when the crew reported a smokey odour on board and decided to divert to Milwaukee. On approach the crew reported that whatever caused the odour appears to have gone out by itself and continued for a safe landing on Milwaukee's runway 25L about 20 minutes later.

A replacement MD-88 reached New York with a delay of 5 hours.