Aircraft equipment problem. High engine vibration shutdown, emergency declared and flight diverted.

Attributes
ACN	342580
Time
Date	199607
Day	Fri
Local Time Of Day	0601 To 1200
Place
Locale Reference	atc facility : birk
State Reference	FO
Altitude	msl bound lower : 31400 msl bound upper : 31500
Environment
Flight Conditions	IMC
Light	Daylight
Aircraft 1
Operator	common carrier : air carrier
Make Model Name	Commercial Fixed Wing
Operating Under FAR Part	Part 121
Navigation In Use	Other Other
Flight Phase	climbout : intermediate altitude cruise other
Route In Use	enroute airway : birk
Flight Plan	IFR
Person 1
Affiliation	company : air carrier
Function	flight crew : first officer
Qualification	pilot : flight engineer pilot : atp
Experience	flight time last 90 days : 100 flight time total : 17000 flight time type : 3470
ASRS Report	342580
Person 2
Affiliation	company : air carrier
Function	flight crew : captain oversight : pic
Qualification	pilot : atp pilot : flight engineer
Experience	flight time total : 16800
ASRS Report	342579
Events
Anomaly	aircraft equipment problem : critical other anomaly other
Independent Detector	other flight crewa other other : unspecified cockpit
Resolutory Action	flight crew : declared emergency none taken : unable
Consequence	Other
Supplementary
Primary Problem	Aircraft

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.

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.