An air carrier B767 suffered several compressor stalls over the atlantic.

Attributes
ACN	356571
Time
Date	199612
Day	Tue
Local Time Of Day	0601 To 1200
Place
Locale Reference	atc facility : snn
State Reference	FO
Altitude	msl bound lower : 39000 msl bound upper : 39000
Environment
Flight Conditions	VMC
Light	Dawn
Aircraft 1
Controlling Facilities	artcc : eisn tower : msp
Operator	common carrier : air carrier
Make Model Name	B767 Undifferentiated or Other Model
Operating Under FAR Part	Part 121
Navigation In Use	Other Other
Flight Phase	cruise other
Route In Use	enroute : atlantic
Flight Plan	IFR
Person 1
Affiliation	company : air carrier
Function	flight crew : first officer
Qualification	pilot : atp pilot : commercial pilot : instrument pilot : flight engineer
Experience	flight time last 90 days : 240 flight time total : 9000 flight time type : 600
ASRS Report	356571
Person 2
Affiliation	company : air carrier
Function	flight crew : first officer
Qualification	pilot : atp
Events
Anomaly	aircraft equipment problem : less severe inflight encounter : weather
Independent Detector	aircraft equipment other aircraft equipment : unspecified other flight crewa other other : unspecified
Resolutory Action	flight crew : overcame equipment problem
Consequence	other
Supplementary
Primary Problem	Aircraft
Air Traffic Incident	other

Narrative:

We were airborne for 4 hours 30 mins and were level at FL370. Our flight plan had us planned to climb to FL390 approaching 20 west. The FMC indicated that we had the capability to do so. We received clearance to climb to FL390. We programmed the FMC and climbed in clear conditions to FL390. Upon leveloff, the FMC pulled the throttles back to cruise power when we heard several compressor stalls. We applied flight ignition and anti-ice on and reduced power on the right engine as the EPR was fluctuating. The engine stabilized and we continued on without any indications of fluctuations. Our passenger were basically all sleeping and were not concerned. However, it did startle several flight attendants, the loud bang of the compressor stalling. We explained the situation and all was well for the entire flight. Our cabin attendants are very concerned about loud noises ever since we started flying B767 across the atlantic, they were used to B747 -- they feel more secure with 4 engines instead of 2.

Original NASA ASRS Text

Title: AN ACR B767 SUFFERED SEVERAL COMPRESSOR STALLS OVER THE ATLANTIC.

Narrative: WE WERE AIRBORNE FOR 4 HRS 30 MINS AND WERE LEVEL AT FL370. OUR FLT PLAN HAD US PLANNED TO CLB TO FL390 APCHING 20 W. THE FMC INDICATED THAT WE HAD THE CAPABILITY TO DO SO. WE RECEIVED CLRNC TO CLB TO FL390. WE PROGRAMMED THE FMC AND CLBED IN CLR CONDITIONS TO FL390. UPON LEVELOFF, THE FMC PULLED THE THROTTLES BACK TO CRUISE PWR WHEN WE HEARD SEVERAL COMPRESSOR STALLS. WE APPLIED FLT IGNITION AND ANTI-ICE ON AND REDUCED PWR ON THE R ENG AS THE EPR WAS FLUCTUATING. THE ENG STABILIZED AND WE CONTINUED ON WITHOUT ANY INDICATIONS OF FLUCTUATIONS. OUR PAX WERE BASICALLY ALL SLEEPING AND WERE NOT CONCERNED. HOWEVER, IT DID STARTLE SEVERAL FLT ATTENDANTS, THE LOUD BANG OF THE COMPRESSOR STALLING. WE EXPLAINED THE SIT AND ALL WAS WELL FOR THE ENTIRE FLT. OUR CABIN ATTENDANTS ARE VERY CONCERNED ABOUT LOUD NOISES EVER SINCE WE STARTED FLYING B767 ACROSS THE ATLANTIC, THEY WERE USED TO B747 -- THEY FEEL MORE SECURE WITH 4 ENGS INSTEAD OF 2.

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.