<< >> NASA ASRS Report 746366, July 2007

B747-300 flight crew experiences #3 engine fire warning at 400 feet after takeoff. After declaring an emergency and dumping fuel flight crew returns to departure airport.

Attributes
ACN	746366
Time
Date	200707
Local Time Of Day	0601 To 1200
Place
Locale Reference	atc facility : zzz.tracon
State Reference	US
Altitude	agl single value : 400
Environment
Flight Conditions	Mixed
Light	Daylight
Aircraft 1
Controlling Facilities	tracon : zzz.tracon
Operator	common carrier : air carrier
Make Model Name	B747-300
Operating Under FAR Part	Part 121
Flight Phase	climbout : initial
Flight Plan	IFR
Person 1
Affiliation	company : air carrier
Function	flight crew : captain oversight : pic
Qualification	pilot : atp
Experience	flight time last 90 days : 230 flight time total : 20812 flight time type : 1005
ASRS Report	746366
Events
Anomaly	aircraft equipment problem : critical other anomaly
Independent Detector	aircraft equipment other aircraft equipment : eicas fire warning other flight crewa
Resolutory Action	controller : issued new clearance flight crew : declared emergency flight crew : landed in emergency condition
Consequence	other
Supplementary
Problem Areas	Aircraft
Primary Problem	Aircraft

Narrative:

Engine fire indication on #3 engine at 400 ft AGL after takeoff from runway xx at ZZZ. Declared an emergency; completed checklists; dumped fuel; and made an uneventful landing. Callback conversation with reporter revealed the following information: the #3 thrust lever could not be retarded when called for by the engine fire checklist and the engine had to be shut down with takeoff thrust set. Post flight inspection revealed that a high pressure bleed duct had ruptured initiating the fire warning; melting wiring; and rendering the thrust linkage inoperative.

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Original NASA ASRS Text

Title: B747-300 FLT CREW EXPERIENCES #3 ENG FIRE WARNING AT 400 FEET AFTER TKOF. AFTER DECLARING AN EMERGENCY AND DUMPING FUEL FLT CREW RETURNS TO DEPARTURE ARPT.

Narrative: ENG FIRE INDICATION ON #3 ENG AT 400 FT AGL AFTER TKOF FROM RWY XX AT ZZZ. DECLARED AN EMER; COMPLETED CHKLISTS; DUMPED FUEL; AND MADE AN UNEVENTFUL LNDG. CALLBACK CONVERSATION WITH RPTR REVEALED THE FOLLOWING INFO: THE #3 THRUST LEVER COULD NOT BE RETARDED WHEN CALLED FOR BY THE ENGINE FIRE CHECKLIST AND THE ENGINE HAD TO BE SHUT DOWN WITH TKOF THRUST SET. POST FLIGHT INSPECTION REVEALED THAT A HIGH PRESSURE BLEED DUCT HAD RUPTURED INITIATING THE FIRE WARNING; MELTING WIRING; AND RENDERING THE THRUST LINKAGE INOPERATIVE.

Data retrieved from NASA's ASRS site as of January 2009 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.