Narrative:

Engine fire warning/failure on takeoff at approximately 1700' AGL, due to failure of bleed-air duct. Returned to departure station. Landing uneventful. Dumped about 2500-3000 pounds fuel. Callback conversation with reporter revealed the following: we thought we had an engine fire an discharged CO2 with no effect on fire light. Meantime we were so over landing weight I felt it mandatory that we dump fuel. Had some reaction from people on ground that had the fuel dumped on them from low altitude. Did a turn around and landed downwind on 14R 8 KTS tailwind. Ground equipment met us. Turned out a hot air duct had burst and kept feeding to the fire alarm sensor.

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Original NASA ASRS Text

Title: FLT CREW OF LGT HAD ENGINE FIRE WARNING IMMEDIATELY AFTER TKOF AT ORD. RETURNED, LANDED WITHOUT INCIDENT AFTER DUMPING FUEL.

Narrative: ENGINE FIRE WARNING/FAILURE ON TKOF AT APPROX 1700' AGL, DUE TO FAILURE OF BLEED-AIR DUCT. RETURNED TO DEP STATION. LNDG UNEVENTFUL. DUMPED ABOUT 2500-3000 LBS FUEL. CALLBACK CONVERSATION WITH REPORTER REVEALED THE FOLLOWING: WE THOUGHT WE HAD AN ENGINE FIRE AN DISCHARGED CO2 WITH NO EFFECT ON FIRE LIGHT. MEANTIME WE WERE SO OVER LNDG WEIGHT I FELT IT MANDATORY THAT WE DUMP FUEL. HAD SOME REACTION FROM PEOPLE ON GND THAT HAD THE FUEL DUMPED ON THEM FROM LOW ALT. DID A TURN AROUND AND LANDED DOWNWIND ON 14R 8 KTS TAILWIND. GND EQUIPMENT MET US. TURNED OUT A HOT AIR DUCT HAD BURST AND KEPT FEEDING TO THE FIRE ALARM SENSOR.

Data retrieved from NASA's ASRS site as of August 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.