A B763 crew, en route madrid, spain (lemd) to mia, were informed by the cabin crew of an unusual vibration emanating from the aft cabin. A diversion to terceira, azores (lpla) was accomplished, when attempts to thwart that vibration failed.

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Attributes
ACN	540367
Time
Date	200202
Day	Wed
Local Time Of Day	1201 To 1800
Place
Locale Reference	atc facility : zzzz.artcc
State Reference	FO
Environment
Light	Daylight
Aircraft 1
Operator	common carrier : air carrier
Make Model Name	B767-300 and 300 ER
Operating Under FAR Part	Part 121
Flight Phase	cruise : level
Flight Plan	IFR
Person 1
Affiliation	company : air carrier
Function	flight attendant : on duty
Experience	flight attendant time airline total : 32 flight attendant time total : 32 flight attendant time type : 90
ASRS Report	540367
Person 2
Affiliation	company : air carrier
Function	flight crew : captain oversight : pic
Events
Anomaly	aircraft equipment problem : critical other anomaly other
Independent Detector	other other : 3 fa #2
Resolutory Action	controller : provided flight assist flight crew : landed as precaution flight crew : diverted to another airport flight crew : declared emergency
Consequence	other
Supplementary
Problem Areas	Flight Crew Human Performance Cabin Crew Human Performance Aircraft
Primary Problem	Aircraft

Narrative:

Approximately 3 hours after takeoff from mad, the flight attendant #2 noticed an unusual vibration on the right floor in the area of the right aft lavatory. On investigation, the vibration seemed to run up the right aisle of the business class galley. The pilots were informed, examined the vibration area, tried turning several switches off with no improvement. The company was informed and the decision was made to land at ter. We returned to mia the following morning on a plane ferried in from lhr.

Original NASA ASRS Text

Title: A B763 CREW, ENRTE MADRID, SPAIN (LEMD) TO MIA, WERE INFORMED BY THE CABIN CREW OF AN UNUSUAL VIBRATION EMANATING FROM THE AFT CABIN. A DIVERSION TO TERCEIRA, AZORES (LPLA) WAS ACCOMPLISHED, WHEN ATTEMPTS TO THWART THAT VIBRATION FAILED.

Narrative: APPROX 3 HRS AFTER TKOF FROM MAD, THE FLT ATTENDANT #2 NOTICED AN UNUSUAL VIBRATION ON THE R FLOOR IN THE AREA OF THE R AFT LAVATORY. ON INVESTIGATION, THE VIBRATION SEEMED TO RUN UP THE R AISLE OF THE BUSINESS CLASS GALLEY. THE PLTS WERE INFORMED, EXAMINED THE VIBRATION AREA, TRIED TURNING SEVERAL SWITCHES OFF WITH NO IMPROVEMENT. THE COMPANY WAS INFORMED AND THE DECISION WAS MADE TO LAND AT TER. WE RETURNED TO MIA THE FOLLOWING MORNING ON A PLANE FERRIED IN FROM LHR.

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.