Flight crew of cpr light transport smells burning odor. They check with passenger who indicate a wisp of smoke from the base of a divan. Left bleed air is turned off and checklist run as they divert to nearby airport.

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Attributes
ACN	394116
Time
Date	199802
Day	Wed
Local Time Of Day	1201 To 1800
Place
Locale Reference	atc facility : bna
State Reference	TN
Altitude	msl bound lower : 37000 msl bound upper : 37000
Environment
Flight Conditions	VMC
Light	Daylight
Aircraft 1
Controlling Facilities	artcc : zme
Operator	general aviation : corporate
Make Model Name	Commercial Fixed Wing
Operating Under FAR Part	Part 91
Flight Phase	cruise other other
Flight Plan	IFR
Person 1
Affiliation	Other
Function	flight crew : captain oversight : pic
Qualification	pilot : atp
Experience	flight time last 90 days : 110 flight time total : 5100 flight time type : 420
ASRS Report	394116
Person 2
Affiliation	Other
Function	flight crew : first officer
Qualification	pilot : commercial pilot : instrument
Events
Anomaly	aircraft equipment problem : critical other anomaly other
Independent Detector	other flight crewa other other : unspecified
Resolutory Action	flight crew : declared emergency other
Consequence	Other
Supplementary
Primary Problem	Aircraft

Narrative:

While at cruise, the first officer and I noticed a faint burning smell. I asked first officer to turn off cockpit vent blower and then check the passenger to see if they smelled anything. Passenger replied that there was a small wisp of smoke coming from the base of the rear divan on the left side sidewall. I turned the left bleed air off and proceeded with the 'smoke, fire in cabin' checklist. I also informed ZME we needed to descend to the nearest suitable airport. They vectored us to bna and we made an uneventful landing. A mechanic checked out the problem and found the wing heat duct insulation and carpet were crushed down onto the duck due to lack of clearance between the duct and the left sidewall and armrest. I had the wing heat on on climb out and failed to turn it off after climbing out of the clouds at about 28000 ft. I am very grateful to ZME and nashville approach for their help and cooperation.

Original NASA ASRS Text

Title: FLC OF CPR LTT SMELLS BURNING ODOR. THEY CHK WITH PAX WHO INDICATE A WISP OF SMOKE FROM THE BASE OF A DIVAN. L BLEED AIR IS TURNED OFF AND CHKLIST RUN AS THEY DIVERT TO NEARBY ARPT.

Narrative: WHILE AT CRUISE, THE FO AND I NOTICED A FAINT BURNING SMELL. I ASKED FO TO TURN OFF COCKPIT VENT BLOWER AND THEN CHK THE PAX TO SEE IF THEY SMELLED ANYTHING. PAX REPLIED THAT THERE WAS A SMALL WISP OF SMOKE COMING FROM THE BASE OF THE REAR DIVAN ON THE L SIDE SIDEWALL. I TURNED THE L BLEED AIR OFF AND PROCEEDED WITH THE 'SMOKE, FIRE IN CABIN' CHKLIST. I ALSO INFORMED ZME WE NEEDED TO DSND TO THE NEAREST SUITABLE ARPT. THEY VECTORED US TO BNA AND WE MADE AN UNEVENTFUL LNDG. A MECH CHKED OUT THE PROB AND FOUND THE WING HEAT DUCT INSULATION AND CARPET WERE CRUSHED DOWN ONTO THE DUCK DUE TO LACK OF CLRNC BTWN THE DUCT AND THE L SIDEWALL AND ARMREST. I HAD THE WING HEAT ON ON CLBOUT AND FAILED TO TURN IT OFF AFTER CLBING OUT OF THE CLOUDS AT ABOUT 28000 FT. I AM VERY GRATEFUL TO ZME AND NASHVILLE APCH FOR THEIR HELP AND COOPERATION.

Data retrieved from NASA's ASRS site as of July 2007 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.