B757 engine shut down due to high vibration. Aircraft flight crew equipment problem.

Attributes
ACN	344299
Time
Date	199608
Day	Wed
Local Time Of Day	0001 To 0600
Place
Locale Reference	atc facility : esl
State Reference	WV
Altitude	msl bound lower : 41000 msl bound upper : 41000
Environment
Light	Night
Aircraft 1
Controlling Facilities	artcc : zdc
Operator	common carrier : air carrier
Make Model Name	B757 Undifferentiated or Other Model
Operating Under FAR Part	Part 121
Navigation In Use	Other Other
Flight Phase	descent other other other
Flight Plan	IFR
Person 1
Affiliation	company : air carrier
Function	flight crew : captain oversight : pic
Qualification	pilot : atp
ASRS Report	344299
Person 2
Affiliation	company : air carrier
Function	flight crew : first officer
Qualification	pilot : commercial pilot : instrument
Events
Anomaly	aircraft equipment problem : critical
Independent Detector	aircraft equipment other aircraft equipment : unspecified
Resolutory Action	flight crew : declared emergency other
Consequence	Other
Supplementary
Primary Problem	Aircraft

Narrative:

Cleared out of FL410 to FL330. As throttles went to idle, #2 engine N2 indicated in amber band on vibration indicator. It did cause vibration to decrease back to white band but then increased back to amber band to 5.0. Vibration could be felt in airframe, rudder pedals it could be heard. Refereed to engine vibration B757 abnormal procedure which led us to engine fire/damage/shutdown checklist. We declared an emergency and asked for clearance to iad, ran engine fire/damage/shutdown procedure, one engine approach and go around procedure and emergency landing procedure. We briefed #1 flight attendant on possible ground evacuate/evacuation. PA was made to passenger informing them of unscheduled landing at iad. Ran before landing checklist and made single engine landing on runway 12 at iad. Due to time constraints accomplishing required checklists we did not notify company of diversion until on ground at iad.

Original NASA ASRS Text

Title: B757 ENG SHUT DOWN DUE TO HIGH VIBRATION. ACFT FLC EQUIP PROB.

Narrative: CLRED OUT OF FL410 TO FL330. AS THROTTLES WENT TO IDLE, #2 ENG N2 INDICATED IN AMBER BAND ON VIBRATION INDICATOR. IT DID CAUSE VIBRATION TO DECREASE BACK TO WHITE BAND BUT THEN INCREASED BACK TO AMBER BAND TO 5.0. VIBRATION COULD BE FELT IN AIRFRAME, RUDDER PEDALS IT COULD BE HEARD. REFEREED TO ENG VIBRATION B757 ABNORMAL PROC WHICH LED US TO ENG FIRE/DAMAGE/SHUTDOWN CHKLIST. WE DECLARED AN EMER AND ASKED FOR CLRNC TO IAD, RAN ENG FIRE/DAMAGE/SHUTDOWN PROC, ONE ENG APCH AND GAR PROC AND EMER LNDG PROC. WE BRIEFED #1 FLT ATTENDANT ON POSSIBLE GND EVAC. PA WAS MADE TO PAX INFORMING THEM OF UNSCHEDULED LNDG AT IAD. RAN BEFORE LNDG CHKLIST AND MADE SINGLE ENG LNDG ON RWY 12 AT IAD. DUE TO TIME CONSTRAINTS ACCOMPLISHING REQUIRED CHKLISTS WE DID NOT NOTIFY COMPANY OF DIVERSION UNTIL ON GND AT IAD.

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.