<< >> NASA ASRS Report 748056, August 2007

B777-200 experienced compressor stalls on departure. Flight crew dumped fuel and returned to departure airport for landing.

Attributes
ACN	748056
Time
Date	200708
Local Time Of Day	1201 To 1800
Place
Locale Reference	airport : zzz.airport
State Reference	US
Altitude	msl single value : 1500
Environment
Flight Conditions	IMC
Aircraft 1
Controlling Facilities	tracon : zzz.tracon
Operator	common carrier : air carrier
Make Model Name	B777-200
Operating Under FAR Part	Part 121
Flight Phase	climbout : initial
Flight Plan	IFR
Person 1
Affiliation	company : air carrier
Function	flight crew : first officer
Experience	flight time last 90 days : 210 flight time total : 13000 flight time type : 600
ASRS Report	748056
Person 2
Affiliation	company : air carrier
Function	flight crew : captain oversight : pic
Experience	flight time last 90 days : 200 flight time total : 17000 flight time type : 1500
ASRS Report	747801
Events
Anomaly	aircraft equipment problem : critical
Independent Detector	other flight crewa other flight crewb
Resolutory Action	flight crew : diverted to another airport flight crew : landed as precaution flight crew : declared emergency
Supplementary
Problem Areas	Aircraft
Primary Problem	Aircraft

Narrative:

Normal takeoff on an aircraft with engine intermix. I was PF navigating with LNAV. During acceleration and cleanup after takeoff at approximately 1500 ft; just above the cloud deck; we felt and heard engine surge with multiple compressor stalls. I flew while the captain assessed the engines. Surge stopped when we reduced the right throttle to idle and all indications were normal except an engine egt exceedance noted; so we let it run at idle. We intercepted the appropriate VOR radial per the engine fail on takeoff procedure and advised ATC of that. We ran the appropriate checklists and talked to dispatch and maintenance. With maintenance concurrence we left the right engine running at idle and dumped fuel to the structural limit weight for return to ZZZ. We advised ATC of the dump; and they vectored us around at 3000 ft for that procedure. We started the APU and did an uneventful flap 20 degree approach and landing.

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Original NASA ASRS Text

Title: B777-200 EXPERIENCED COMPRESSOR STALLS ON DEP. FLT CREW DUMPED FUEL AND RETURNED TO DEP ARPT FOR LNDG.

Narrative: NORMAL TKOF ON AN ACFT WITH ENG INTERMIX. I WAS PF NAVING WITH LNAV. DURING ACCELERATION AND CLEANUP AFTER TKOF AT APPROX 1500 FT; JUST ABOVE THE CLOUD DECK; WE FELT AND HEARD ENG SURGE WITH MULTIPLE COMPRESSOR STALLS. I FLEW WHILE THE CAPT ASSESSED THE ENGS. SURGE STOPPED WHEN WE REDUCED THE R THROTTLE TO IDLE AND ALL INDICATIONS WERE NORMAL EXCEPT AN ENG EGT EXCEEDANCE NOTED; SO WE LET IT RUN AT IDLE. WE INTERCEPTED THE APPROPRIATE VOR RADIAL PER THE ENG FAIL ON TKOF PROC AND ADVISED ATC OF THAT. WE RAN THE APPROPRIATE CHKLISTS AND TALKED TO DISPATCH AND MAINT. WITH MAINT CONCURRENCE WE LEFT THE R ENG RUNNING AT IDLE AND DUMPED FUEL TO THE STRUCTURAL LIMIT WT FOR RETURN TO ZZZ. WE ADVISED ATC OF THE DUMP; AND THEY VECTORED US AROUND AT 3000 FT FOR THAT PROC. WE STARTED THE APU AND DID AN UNEVENTFUL FLAP 20 DEG APCH AND LNDG.

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.