out of service after the incident for maintenance work. when it returned on january 21st. u.s. airways reported to the faa a scorched odor like a jim or locker room filled the aircraft. maintenance found no problems and the plane remains in service. >> this is a problem that all airlines share. northwest airlines also suffered a series of three fume events over the past several weeks on the same aircraft flying between frankfurt and detroit. northwest says we are investigating each case of illness but we cannot pinpoint a specific cause. boeing concedes there is a chance of fume eye vents but as the air is safe. >> should folks are worried when they get on a plane. >> it's not common but there has been study done indicating there are fume events of 1 out of