Southwest B737 near South Bend on Jan 28th 2014, loss of cabin pressure

A Southwest Airlines Boeing 737-700, flight WN-4202 from Milwaukee,WI to Baltimore,MD (USA) with 65 passengers and 5 crew, was enroute at FL410 about 30nm east of South Bend,IN (USA) when the crew initiated an emergency descent due to the loss of cabin pressure, the passenger oxygen masks were released. The aircraft diverted to South Bend for a safe landing about 25 minutes later.

Passengers reported smell of smoke on board.

The airline reported the aircraft had pressurization problems, the passenger oxygen masks were released and the oxygen generators activated.

The oxygen generators are known to get quite hot due to the chemical reaction to generate oxygen, it is not unusual to get a smell of smoke as well as light haze from the oxygen generators.