Aircraft equipment problem electrical smoke and fire in cockpit.

Attributes
ACN	295984
Time
Date	199502
Day	Thu
Local Time Of Day	0601 To 1200
Place
Locale Reference	atc facility : pdz airport : ont
State Reference	CA
Altitude	agl bound lower : 0 agl bound upper : 8000
Environment
Flight Conditions	Mixed
Light	Daylight
Aircraft 1
Operator	common carrier : air carrier
Make Model Name	Beech 1900
Operating Under FAR Part	Part 135
Flight Phase	cruise other other
Route In Use	enroute airway : ont
Flight Plan	IFR
Person 1
Affiliation	company : air carrier
Function	flight crew : captain oversight : pic
Qualification	pilot : commercial pilot : atp pilot : cfi pilot : instrument
Experience	flight time last 90 days : 250 flight time total : 4200 flight time type : 2500
ASRS Report	295984
Person 2
Affiliation	company : air carrier
Function	flight crew : first officer
Qualification	pilot : instrument pilot : commercial
Events
Anomaly	aircraft equipment problem : critical other anomaly other
Independent Detector	other flight crewa
Resolutory Action	flight crew : declared emergency none taken : unable other
Consequence	Other
Supplementary
Primary Problem	Aircraft

Narrative:

Noticed a burning smell which seemed to be electrical in nature/ wire insulation burning, etc. About 30 seconds later we started seeing smoke in the cockpit, white/grey in color, and which seemed to originate in the cockpit. The rate which the smoke accumulated was significant. An emergency was declared requesting radar vectors to either 2ONTARIO or orange county airport. We dumped the cabin, pulled the vent, and initiated donning the oxygen masks. Non-essential electrical components and switches were turned off. We got vectored to ontario airport, landing about 3 min after the first symptoms were noticed. The smoke disappeared when dumping the cabin and did not reappear, nor did the burning smell. Taxiing in and shutdown were uneventful with no lingering or recurring symptoms.

Original NASA ASRS Text

Title: ACFT EQUIP PROB ELECTRICAL SMOKE AND FIRE IN COCKPIT.

Narrative: NOTICED A BURNING SMELL WHICH SEEMED TO BE ELECTRICAL IN NATURE/ WIRE INSULATION BURNING, ETC. ABOUT 30 SECONDS LATER WE STARTED SEEING SMOKE IN THE COCKPIT, WHITE/GREY IN COLOR, AND WHICH SEEMED TO ORIGINATE IN THE COCKPIT. THE RATE WHICH THE SMOKE ACCUMULATED WAS SIGNIFICANT. AN EMER WAS DECLARED REQUESTING RADAR VECTORS TO EITHER 2ONTARIO OR ORANGE COUNTY ARPT. WE DUMPED THE CABIN, PULLED THE VENT, AND INITIATED DONNING THE OXYGEN MASKS. NON-ESSENTIAL ELECTRICAL COMPONENTS AND SWITCHES WERE TURNED OFF. WE GOT VECTORED TO ONTARIO ARPT, LNDG ABOUT 3 MIN AFTER THE FIRST SYMPTOMS WERE NOTICED. THE SMOKE DISAPPEARED WHEN DUMPING THE CABIN AND DID NOT REAPPEAR, NOR DID THE BURNING SMELL. TAXIING IN AND SHUTDOWN WERE UNEVENTFUL WITH NO LINGERING OR RECURRING SYMPTOMS.

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.