<< >> NASA ASRS Report 124304, October 1989

Flight crew of large transport had engine fire warning immediately after takeoff at ord. Returned, landed without incident after dumping fuel.

Attributes
ACN	124304
Time
Date	198910
Day	Tue
Local Time Of Day	0601 To 1200
Place
Locale Reference	airport : ord
State Reference	IL
Altitude	msl bound lower : 1700 msl bound upper : 2500
Environment
Flight Conditions	VMC
Light	Daylight
Aircraft 1
Controlling Facilities	tower : ord
Operator	common carrier : air carrier
Make Model Name	Large Transport, Low Wing, 3 Turbojet Eng
Flight Phase	climbout : initial descent other landing other
Route In Use	enroute : on vectors
Flight Plan	IFR
Person 1
Affiliation	company : air carrier
Function	flight crew : captain oversight : pic
Qualification	pilot : atp
Experience	flight time last 90 days : 153 flight time total : 11800 flight time type : 11400
ASRS Report	124304
Person 2
Affiliation	company : air carrier
Function	flight crew : first officer
Qualification	pilot : atp
Events
Anomaly	aircraft equipment problem : critical
Independent Detector	other flight crewa
Resolutory Action	flight crew : overcame equipment problem
Consequence	Other
Supplementary
Primary Problem	Aircraft
Air Traffic Incident	other

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.