Narrative:

Flight was cruising at FL370, on A554 between noogy and lamer, in high cirrus type clouds. The WX radar was painting only rain showers within 100 mi of our position. We experienced a slight updraft, a compressor stall on the right engine, approximately 4 seconds of moderate turbulence, and another compressor stall. I retarded the right throttle, turned on the flight start ignition, and the anti-ice. I then attempted to advance the right throttle only to incur 2 more compressor stalls and a resulting loss of thrust. We then attempted to contact ATC for a descent clearance to FL330. Unable to do so, I exercised my captain's emergency authority/authorized to turn left off course and descend to FL330. We offset A554 by approximately 20 mi while descending. We broadcast in the blind on HF, 121.5 and 130.55 our position and our descent to FL330. Several aircraft responded to say new york was reading us and to try again. At FL330 the right engine operated normally and we received clearance direct lamer and on course. We reviewed the QRH and the fhb. The engine operated normally for the balance of flight and the return flight. After landing at santa domingo, maintenance performed an engine check at the direction of the maintenance coordinator.

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Original NASA ASRS Text

Title: A B767-200 ACCOMPLISHED AN EMER DSCNT FROM FL370 TO FL330 DUE TO #2 ENG COMPRESSOR STALL. ENG OP AT FL330 WAS OK.

Narrative: FLT WAS CRUISING AT FL370, ON A554 BTWN NOOGY AND LAMER, IN HIGH CIRRUS TYPE CLOUDS. THE WX RADAR WAS PAINTING ONLY RAIN SHOWERS WITHIN 100 MI OF OUR POS. WE EXPERIENCED A SLIGHT UPDRAFT, A COMPRESSOR STALL ON THE R ENG, APPROX 4 SECONDS OF MODERATE TURB, AND ANOTHER COMPRESSOR STALL. I RETARDED THE R THROTTLE, TURNED ON THE FLT START IGNITION, AND THE ANTI-ICE. I THEN ATTEMPTED TO ADVANCE THE R THROTTLE ONLY TO INCUR 2 MORE COMPRESSOR STALLS AND A RESULTING LOSS OF THRUST. WE THEN ATTEMPTED TO CONTACT ATC FOR A DSCNT CLRNC TO FL330. UNABLE TO DO SO, I EXERCISED MY CAPT'S EMER AUTH TO TURN L OFF COURSE AND DSND TO FL330. WE OFFSET A554 BY APPROX 20 MI WHILE DSNDING. WE BROADCAST IN THE BLIND ON HF, 121.5 AND 130.55 OUR POS AND OUR DSCNT TO FL330. SEVERAL ACFT RESPONDED TO SAY NEW YORK WAS READING US AND TO TRY AGAIN. AT FL330 THE R ENG OPERATED NORMALLY AND WE RECEIVED CLRNC DIRECT LAMER AND ON COURSE. WE REVIEWED THE QRH AND THE FHB. THE ENG OPERATED NORMALLY FOR THE BAL OF FLT AND THE RETURN FLT. AFTER LNDG AT SANTA DOMINGO, MAINT PERFORMED AN ENG CHK AT THE DIRECTION OF THE MAINT COORDINATOR.

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.