Widebody transport return land pdx when #2 engine developed excessive vibration.

Attributes
ACN	237191
Time
Date	199303
Day	Sun
Local Time Of Day	1201 To 1800
Place
Locale Reference	atc facility : tou airport : pdx
State Reference	WA
Altitude	msl bound lower : 31000 msl bound upper : 31000
Environment
Flight Conditions	VMC
Light	Daylight
Aircraft 1
Controlling Facilities	artcc : zse
Operator	common carrier : air carrier
Make Model Name	Widebody, Low Wing, 3 Turbojet Eng
Navigation In Use	Other Other
Flight Phase	cruise other
Flight Plan	IFR
Person 1
Affiliation	company : air carrier
Function	flight crew : captain oversight : pic
Qualification	pilot : atp
Experience	flight time last 90 days : 120 flight time total : 27000
ASRS Report	237191
Person 2
Affiliation	company : air carrier
Function	flight crew : first officer
Qualification	pilot : atp
Experience	flight time last 90 days : 40 flight time total : 11800 flight time type : 80
ASRS Report	236358
Events
Anomaly	aircraft equipment problem : critical
Independent Detector	aircraft equipment other aircraft equipment : unspecified
Resolutory Action	other
Consequence	Other
Supplementary
Primary Problem	Aircraft
Air Traffic Incident	other

Narrative:

Precautionary shutdown #2 engine account excessive vibration. Fuel dumped to landing weight. Returned to pdx, emergency equipment standing by.

Original NASA ASRS Text

Title: WDB RETURN LAND PDX WHEN #2 ENG DEVELOPED EXCESSIVE VIBRATION.

Narrative: PRECAUTIONARY SHUTDOWN #2 ENG ACCOUNT EXCESSIVE VIBRATION. FUEL DUMPED TO LNDG WT. RETURNED TO PDX, EMER EQUIP STANDING BY.

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.