A widebody transport air carrier exercised its emergency authority to descend and turn over the north atlantic. This all became necessary after a series of compressor stalls on the #3 engine.

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Attributes
ACN	225841
Time
Date	199211
Day	Sat
Local Time Of Day	0001 To 0600
Place
Locale Reference	atc facility : yyt
State Reference	NF
Altitude	msl bound lower : 27000 msl bound upper : 35000
Environment
Flight Conditions	IMC
Light	Night
Aircraft 1
Controlling Facilities	artcc : czqx
Operator	common carrier : air carrier
Make Model Name	Widebody, Low Wing, 3 Turbojet Eng
Navigation In Use	Other
Flight Phase	cruise other cruise other descent other
Route In Use	enroute : other oceanic enroute : atlantic
Flight Plan	IFR
Person 1
Affiliation	company : air carrier
Function	flight crew : first officer
Qualification	pilot : atp
Experience	flight time last 90 days : 210 flight time total : 16500 flight time type : 1400
ASRS Report	225841
Person 2
Affiliation	company : air carrier
Function	flight crew : captain oversight : pic
Qualification	pilot : atp
Experience	flight time last 90 days : 200 flight time total : 24000 flight time type : 1500
ASRS Report	225843
Events
Anomaly	aircraft equipment problem : critical altitude deviation : excursion from assigned altitude other anomaly other other spatial deviation
Independent Detector	aircraft equipment other aircraft equipment : unspecified other flight crewa
Resolutory Action	controller : issued new clearance flight crew : declared emergency flight crew : overcame equipment problem other
Consequence	Other
Supplementary
Primary Problem	Aircraft

Narrative:

#3 engine failed due to several complete stalls in moderate turbulence during transatlantic flight at FL350. Declared an emergency to gander radio and notified them and other aircraft that we were turning left of track and descending out of FL350 which was necessary due to aircraft weight at time of engine loss. Shortly after, gander radio returned to say ATC wanted us to maintain FL350. We notified them that we were unable to maintain FL350 and were descending to FL270 and requested clearance direct to yyt. Request was granted and we set course INS direct to yyt. Following completion of all checklists and emergency procedures, #3 engine was restarted and flight flew on to boston uneventfully.

Original NASA ASRS Text

Title: A WDB ACR EXERCISED ITS EMER AUTHORITY TO DSND AND TURN OVER THE N ATLANTIC. THIS ALL BECAME NECESSARY AFTER A SERIES OF COMPRESSOR STALLS ON THE #3 ENG.

Narrative: #3 ENG FAILED DUE TO SEVERAL COMPLETE STALLS IN MODERATE TURB DURING TRANSATLANTIC FLT AT FL350. DECLARED AN EMER TO GANDER RADIO AND NOTIFIED THEM AND OTHER ACFT THAT WE WERE TURNING L OF TRACK AND DSNDING OUT OF FL350 WHICH WAS NECESSARY DUE TO ACFT WT AT TIME OF ENG LOSS. SHORTLY AFTER, GANDER RADIO RETURNED TO SAY ATC WANTED US TO MAINTAIN FL350. WE NOTIFIED THEM THAT WE WERE UNABLE TO MAINTAIN FL350 AND WERE DSNDING TO FL270 AND REQUESTED CLRNC DIRECT TO YYT. REQUEST WAS GRANTED AND WE SET COURSE INS DIRECT TO YYT. FOLLOWING COMPLETION OF ALL CHKLISTS AND EMER PROCS, #3 ENG WAS RESTARTED AND FLT FLEW ON TO BOSTON UNEVENTFULLY.

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.