Flight crew of a B777-200 heard a big bang at V1 during takeoff and continued takeoff and climb to 7000 ft. At which time 1 engine was shut down, due to a loss of oil pressure and quantity, emergency declared, fuel dumped to landing weight and a return to land was made. Another air carrier flight crew reported a big ball of fire emitted from the engine during takeoff and cabin reported a smoke smell in the cabin.

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Attributes
ACN	383228
Time
Date	199710
Day	Tue
Local Time Of Day	0601 To 1200
Place
Locale Reference	airport : lhr
State Reference	FO
Altitude	msl bound lower : 7000 msl bound upper : 7000
Environment
Flight Conditions	VMC
Light	Daylight
Aircraft 1
Controlling Facilities	tracon : lhr tower : lhr
Operator	common carrier : air carrier
Make Model Name	B777-200
Operating Under FAR Part	Part 121
Navigation In Use	Other Other
Flight Phase	climbout : intermediate altitude climbout : initial climbout : takeoff
Flight Plan	IFR
Person 1
Affiliation	company : air carrier
Function	flight crew : captain oversight : pic
Qualification	pilot : atp
ASRS Report	383228
Person 2
Affiliation	company : air carrier
Function	flight crew : first officer
Qualification	pilot : commercial pilot : instrument pilot : atp
Events
Anomaly	aircraft equipment problem : critical other anomaly other
Independent Detector	aircraft equipment other aircraft equipment : unspecified other flight crewa
Resolutory Action	flight crew : declared emergency other other
Consequence	Other
Supplementary
Primary Problem	Aircraft

Narrative:

Takeoff runway 27L lhr, first officer flying. At approximately V1 heard loud bang and felt strong vibration. Suspected blown nose gear tire. Aircraft performed well on climb to 6000 ft. Cabin filled with smoke on lift-off. At 6000 ft noticed oil pressure in red at 56 psi, oil quantity falling. Call from tower said air carrier X saw large ball of fire erupt from right engine followed by clean exhaust. Oil quantity now zero. Shut down right engine. Declared emergency. Told london we would like to dump fuel. Cleared to 7000 ft and dumped 100000 pounds of fuel. Returned to lhr and landed runway 27R under red alert. Landing uneventful. Crew did a great job. During emergency sent first officer to cabin to check on smoke. Smoke dissipating but first officer could not determine source of smoke by smell. Spoke to flight attendant on the ground and she also could not determine source of smoke by smell. Landed at XX22Z 460000 gross weight (maximum landing weight), prepared cabin for evacuate/evacuation. Unable to contact dispatch directly, relayed through company.

Original NASA ASRS Text

Title: FLC OF A B777-200 HEARD A BIG BANG AT V1 DURING TKOF AND CONTINUED TKOF AND CLB TO 7000 FT. AT WHICH TIME 1 ENG WAS SHUT DOWN, DUE TO A LOSS OF OIL PRESSURE AND QUANTITY, EMER DECLARED, FUEL DUMPED TO LNDG WT AND A RETURN TO LAND WAS MADE. ANOTHER ACR FLC RPTED A BIG BALL OF FIRE EMITTED FROM THE ENG DURING TKOF AND CABIN RPTED A SMOKE SMELL IN THE CABIN.

Narrative: TKOF RWY 27L LHR, FO FLYING. AT APPROX V1 HEARD LOUD BANG AND FELT STRONG VIBRATION. SUSPECTED BLOWN NOSE GEAR TIRE. ACFT PERFORMED WELL ON CLB TO 6000 FT. CABIN FILLED WITH SMOKE ON LIFT-OFF. AT 6000 FT NOTICED OIL PRESSURE IN RED AT 56 PSI, OIL QUANTITY FALLING. CALL FROM TWR SAID ACR X SAW LARGE BALL OF FIRE ERUPT FROM R ENG FOLLOWED BY CLEAN EXHAUST. OIL QUANTITY NOW ZERO. SHUT DOWN R ENG. DECLARED EMER. TOLD LONDON WE WOULD LIKE TO DUMP FUEL. CLRED TO 7000 FT AND DUMPED 100000 LBS OF FUEL. RETURNED TO LHR AND LANDED RWY 27R UNDER RED ALERT. LNDG UNEVENTFUL. CREW DID A GREAT JOB. DURING EMER SENT FO TO CABIN TO CHK ON SMOKE. SMOKE DISSIPATING BUT FO COULD NOT DETERMINE SOURCE OF SMOKE BY SMELL. SPOKE TO FLT ATTENDANT ON THE GND AND SHE ALSO COULD NOT DETERMINE SOURCE OF SMOKE BY SMELL. LANDED AT XX22Z 460000 GROSS WT (MAX LNDG WT), PREPARED CABIN FOR EVAC. UNABLE TO CONTACT DISPATCH DIRECTLY, RELAYED THROUGH COMPANY.

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.