Narrative:

We were enroute at 6;000 ft and were taking vectors from ATC when our lead passenger tapped the first officer on the shoulder and stated 'we have a fire back here'. I immediately got up to investigate and found smoke coming from the video screen receptacle. I removed the video screen and the smoke and heat dissipated completely. I went back to the cockpit and the first officer suggested we declare an emergency and proceed direct to [the airport]; and I agreed. He also requested the fire and rescue equipment to be on stand by and suggested I don my oxygen mask. After doing so; he donned his mask as fumes were present throughout the aircraft.while donning our masks; ATC was pointing out several VFR aircraft; some in class B and some below. One aircraft caused an RA of 'monitor vertical speed'. We had the plane in sight but complied with the RA commands and remained level at 3;000 ft. We advised our passengers that as a precaution; fire and rescue would follow us into the ramp area after landing. We parked away from the buildings to allow room for the fire and rescue trucks. The passengers deplaned and seemed unshaken by the event.

Google
 

Original NASA ASRS Text

Title: A passenger advised the flight crew of a CE560XLS of smoke emanating from the video screen. The Captain removed the screen from its power source while the First Officer declared an emergency and expedited their safe arrival to their destination airport.

Narrative: We were enroute at 6;000 FT and were taking vectors from ATC when our lead passenger tapped the First Officer on the shoulder and stated 'we have a fire back here'. I immediately got up to investigate and found smoke coming from the video screen receptacle. I removed the video screen and the smoke and heat dissipated completely. I went back to the cockpit and the First Officer suggested we declare an emergency and proceed direct to [the airport]; and I agreed. He also requested the fire and rescue equipment to be on stand by and suggested I don my oxygen mask. After doing so; he donned his mask as fumes were present throughout the aircraft.While donning our masks; ATC was pointing out several VFR aircraft; some in Class B and some below. One aircraft caused an RA of 'monitor vertical speed'. We had the plane in sight but complied with the RA commands and remained level at 3;000 FT. We advised our passengers that as a precaution; fire and rescue would follow us into the ramp area after landing. We parked away from the buildings to allow room for the fire and rescue trucks. The passengers deplaned and seemed unshaken by the event.

Data retrieved from NASA's ASRS site as of April 2012 and automatically converted to unabbreviated mixed upper/lowercase text. This report is for informational purposes with no guarantee of accuracy. See NASA's ASRS site for official report.