Flight crew of a B727 cargo flight declared an emergency and diverted to land after smelling smoke fumes in the cockpit. Crew evacuate/evacuationed on the ramp and the problem was found to be a burned up cooling fan.

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Attributes
ACN	337943
Time
Date	199606
Day	Fri
Local Time Of Day	0601 To 1200
Place
Locale Reference	airport : lbf
State Reference	NE
Altitude	msl bound lower : 33000 msl bound upper : 33000
Environment
Flight Conditions	VMC
Light	Daylight
Aircraft 1
Controlling Facilities	artcc : zdv
Operator	common carrier : air carrier
Make Model Name	B727 Undifferentiated or Other Model
Operating Under FAR Part	Part 121
Flight Phase	cruise other
Flight Plan	IFR
Person 1
Affiliation	company : air carrier
Function	flight crew : first officer
Qualification	other other : other pilot : flight engineer pilot : commercial pilot : instrument
Experience	flight time last 90 days : 40 flight time total : 3700 flight time type : 40
ASRS Report	337943
Person 2
Affiliation	company : air carrier
Function	flight crew : captain oversight : pic
Qualification	pilot : atp
Events
Anomaly	aircraft equipment problem : critical other anomaly other
Independent Detector	other flight crewa
Resolutory Action	flight crew : declared emergency other other
Consequence	Other
Supplementary
Primary Problem	Aircraft

Narrative:

During cruise flight we smelled a sulphur then chemical smell in the cockpit. The captain ordered us to go on oxygen and told me to declare an emergency and start a descent, as per our emergency procedures. I contacted center, told them we were declaring an emergency and we needed to start a descent due to fumes in the cockpit. I asked for an MEA and vectors to the closest suitable airport. With minor communication problems due to the oxygen mask we were given 5000 ft and vectors for lbf. While turning onto final and intercepting the localizer, the captain finished the emergency checklists with the flight engineer and took control of the aircraft. The landing was accomplished and normal evacuate/evacuation followed on the ramp with fire/rescue standing by. All procedures were followed. I include this report only to explain our need to declare an emergency and also to exceed 250 KTS below 10000 ft. The eventual cause was determined to be a cooling fan that burned up.

Original NASA ASRS Text

Title: FLC OF A B727 CARGO FLT DECLARED AN EMER AND DIVERTED TO LAND AFTER SMELLING SMOKE FUMES IN THE COCKPIT. CREW EVACED ON THE RAMP AND THE PROB WAS FOUND TO BE A BURNED UP COOLING FAN.

Narrative: DURING CRUISE FLT WE SMELLED A SULPHUR THEN CHEMICAL SMELL IN THE COCKPIT. THE CAPT ORDERED US TO GO ON OXYGEN AND TOLD ME TO DECLARE AN EMER AND START A DSCNT, AS PER OUR EMER PROCS. I CONTACTED CTR, TOLD THEM WE WERE DECLARING AN EMER AND WE NEEDED TO START A DSCNT DUE TO FUMES IN THE COCKPIT. I ASKED FOR AN MEA AND VECTORS TO THE CLOSEST SUITABLE ARPT. WITH MINOR COM PROBS DUE TO THE OXYGEN MASK WE WERE GIVEN 5000 FT AND VECTORS FOR LBF. WHILE TURNING ONTO FINAL AND INTERCEPTING THE LOC, THE CAPT FINISHED THE EMER CHKLISTS WITH THE FE AND TOOK CTL OF THE ACFT. THE LNDG WAS ACCOMPLISHED AND NORMAL EVAC FOLLOWED ON THE RAMP WITH FIRE/RESCUE STANDING BY. ALL PROCS WERE FOLLOWED. I INCLUDE THIS RPT ONLY TO EXPLAIN OUR NEED TO DECLARE AN EMER AND ALSO TO EXCEED 250 KTS BELOW 10000 FT. THE EVENTUAL CAUSE WAS DETERMINED TO BE A COOLING FAN THAT BURNED UP.

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.