Narrative:

We had just made our 71N 040W position report to iceland radio and received clearance to climb from FL310 to FL330. FL330 was set and the power came up to mct. The aircraft just started to climb when we felt something like a real sudden wake turbulence followed by vibration. Seconds later more heavy vibration and a sudden jolt. We thought this was a compressor stall. At first engine indicators looked normal then #2 engine vibrator monitor went amber and showed 5.0. I stopped the climb and pulled the #2 engine power lever to idle. Then tried to advance #2 throttle and vibration started immediately again. We then shut down #2 engine with using in-flight shutdown checklist. Then we declared an emergency with iceland radio, and asked for FL280, which was given. At that time the other crew members went to the drift down charts. Airspeed was deteriorating slowly at FL280. At this time we started our off course turn and asked for FL260, which was given by iceland control. We asked for clearance to bangor, me, which was given and we immediately headed direct to bangor. En route to bangor we checked WX at various stations and decided boston would be more suitable. Iceland radio then gave us clearance to boston where we made a normal ldng.

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Original NASA ASRS Text

Title: ACFT EQUIP PROB. HIGH ENG VIBRATION SHUTDOWN, EMER DECLARED AND FLT DIVERTED.

Narrative: WE HAD JUST MADE OUR 71N 040W POS RPT TO ICELAND RADIO AND RECEIVED CLRNC TO CLB FROM FL310 TO FL330. FL330 WAS SET AND THE PWR CAME UP TO MCT. THE ACFT JUST STARTED TO CLB WHEN WE FELT SOMETHING LIKE A REAL SUDDEN WAKE TURB FOLLOWED BY VIBRATION. SECONDS LATER MORE HVY VIBRATION AND A SUDDEN JOLT. WE THOUGHT THIS WAS A COMPRESSOR STALL. AT FIRST ENG INDICATORS LOOKED NORMAL THEN #2 ENG VIBRATOR MONITOR WENT AMBER AND SHOWED 5.0. I STOPPED THE CLB AND PULLED THE #2 ENG PWR LEVER TO IDLE. THEN TRIED TO ADVANCE #2 THROTTLE AND VIBRATION STARTED IMMEDIATELY AGAIN. WE THEN SHUT DOWN #2 ENG WITH USING INFLT SHUTDOWN CHKLIST. THEN WE DECLARED AN EMER WITH ICELAND RADIO, AND ASKED FOR FL280, WHICH WAS GIVEN. AT THAT TIME THE OTHER CREW MEMBERS WENT TO THE DRIFT DOWN CHARTS. AIRSPD WAS DETERIORATING SLOWLY AT FL280. AT THIS TIME WE STARTED OUR OFF COURSE TURN AND ASKED FOR FL260, WHICH WAS GIVEN BY ICELAND CTL. WE ASKED FOR CLRNC TO BANGOR, ME, WHICH WAS GIVEN AND WE IMMEDIATELY HEADED DIRECT TO BANGOR. ENRTE TO BANGOR WE CHKED WX AT VARIOUS STATIONS AND DECIDED BOSTON WOULD BE MORE SUITABLE. ICELAND RADIO THEN GAVE US CLRNC TO BOSTON WHERE WE MADE A NORMAL LDNG.

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.