MD80 flight attendant called the crew to inform them of excessive vibration in the aft galley floor ...

Attributes
ACN	551381
Time
Date	200206
Day	Sat
Local Time Of Day	0601 To 1200
Place
Locale Reference	atc facility : zau.artcc
State Reference	IL
Environment
Flight Conditions	VMC
Light	Daylight
Aircraft 1
Controlling Facilities	artcc : zau.artcc
Operator	common carrier : air carrier
Make Model Name	MD-88
Operating Under FAR Part	Part 121
Navigation In Use	other
Flight Phase	climbout : intermediate altitude
Flight Plan	IFR
Person 1
Affiliation	company : air carrier
Function	flight crew : captain oversight : pic
Qualification	pilot : atp
Experience	flight time last 90 days : 110 flight time total : 17000 flight time type : 9000
ASRS Report	551381
Person 2
Affiliation	company : air carrier
Function	flight crew : first officer
Events
Anomaly	aircraft equipment problem : less severe maintenance problem : improper maintenance other anomaly other
Independent Detector	other other : 3
Resolutory Action	controller : issued new clearance controller : provided flight assist flight crew : diverted to another airport flight crew : landed as precaution none taken : detected after the fact other
Consequence	other other
Factors
Maintenance	contributing factor : schedule pressure performance deficiency : testing performance deficiency : repair performance deficiency : fault isolation
Supplementary
Problem Areas	Company Maintenance Human Performance Aircraft
Primary Problem	Company

Narrative:

Shortly after takeoff, flight attendant in rear of aircraft reported an unusual vibration in floor of aft galley. As we had just made a high gross weight/high speed takeoff we suspected it might be related to that and advised her to keep us advised. A few mins later she advised that the vibration was persisting and felt like a 'buzz.' we leveled at 15000 ft and the first officer went aft to check on the situation. Flight attendant advised first officer that the vibration had decreased with engine power reduction, but the first officer could still feel it in the floor and the galley walls. We conferred with our dispatch and maintenance control and agreed to return to our departure point (mke). As we were well over landing weight and since all indications in the cockpit were normal, we elected to burn down our fuel and entered a hold at msn. After approximately 1 hour holding, we proceeded to mke and made a normal landing. Aircraft and engines were examined by our maintenance who advised the vibration was coming from the #1 engine but that it was 'within tolerances.' the engine is a JT8D-219.

Original NASA ASRS Text

Title: MD80 FLT ATTENDANT CALLED THE CREW TO INFORM THEM OF EXCESSIVE VIBRATION IN THE AFT GALLEY FLOOR AREA.

Narrative: SHORTLY AFTER TKOF, FLT ATTENDANT IN REAR OF ACFT RPTED AN UNUSUAL VIBRATION IN FLOOR OF AFT GALLEY. AS WE HAD JUST MADE A HIGH GROSS WT/HIGH SPD TKOF WE SUSPECTED IT MIGHT BE RELATED TO THAT AND ADVISED HER TO KEEP US ADVISED. A FEW MINS LATER SHE ADVISED THAT THE VIBRATION WAS PERSISTING AND FELT LIKE A 'BUZZ.' WE LEVELED AT 15000 FT AND THE FO WENT AFT TO CHK ON THE SIT. FLT ATTENDANT ADVISED FO THAT THE VIBRATION HAD DECREASED WITH ENG PWR REDUCTION, BUT THE FO COULD STILL FEEL IT IN THE FLOOR AND THE GALLEY WALLS. WE CONFERRED WITH OUR DISPATCH AND MAINT CTL AND AGREED TO RETURN TO OUR DEP POINT (MKE). AS WE WERE WELL OVER LNDG WT AND SINCE ALL INDICATIONS IN THE COCKPIT WERE NORMAL, WE ELECTED TO BURN DOWN OUR FUEL AND ENTERED A HOLD AT MSN. AFTER APPROX 1 HR HOLDING, WE PROCEEDED TO MKE AND MADE A NORMAL LNDG. ACFT AND ENGS WERE EXAMINED BY OUR MAINT WHO ADVISED THE VIBRATION WAS COMING FROM THE #1 ENG BUT THAT IT WAS 'WITHIN TOLERANCES.' THE ENG IS A JT8D-219.

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.

MD80 flight attendant called the crew to inform them of excessive vibration in the aft galley floor area.