A300 crew had #1 engine, N2 vibration that exceeded maximum limits.

Attributes
ACN	573454
Time
Date	200302
Day	Fri
Local Time Of Day	0601 To 1200
Place
Locale Reference	airport : mia.airport
State Reference	FL
Altitude	msl single value : 33000
Aircraft 1
Controlling Facilities	artcc : zma.artcc
Operator	common carrier : air carrier
Make Model Name	A300
Operating Under FAR Part	Part 121
Flight Phase	cruise : level
Flight Plan	IFR
Person 1
Affiliation	company : air carrier
Function	flight crew : first officer
Qualification	pilot : multi engine pilot : commercial pilot : instrument
ASRS Report	573454
Person 2
Affiliation	company : air carrier
Function	flight crew : captain oversight : pic
Qualification	pilot : atp
ASRS Report	573455
Events
Anomaly	aircraft equipment problem : critical other anomaly other
Independent Detector	aircraft equipment other aircraft equipment : ecam vibration monitor other flight crewa other flight crewb
Resolutory Action	flight crew : landed as precaution flight crew : diverted to another airport
Consequence	other other
Supplementary
Problem Areas	Aircraft
Primary Problem	Aircraft

Narrative:

While flying at FL330 at cruise power, we received an ECAM alert for engine #1 N2 vibration. The vibration varied, but increased to above the maximum limit of 7.5. We decreased power slightly with the #1 throttle and vibrations reduced to within limits, but still above normal. We were about 300 NM southeast of mia and elected to return per our operations manual. Return to base was uneventful, and we taxied to the gate unassisted.

Original NASA ASRS Text

Title: A300 CREW HAD #1 ENG, N2 VIBRATION THAT EXCEEDED MAX LIMITS.

Narrative: WHILE FLYING AT FL330 AT CRUISE PWR, WE RECEIVED AN ECAM ALERT FOR ENG #1 N2 VIBRATION. THE VIBRATION VARIED, BUT INCREASED TO ABOVE THE MAX LIMIT OF 7.5. WE DECREASED PWR SLIGHTLY WITH THE #1 THROTTLE AND VIBRATIONS REDUCED TO WITHIN LIMITS, BUT STILL ABOVE NORMAL. WE WERE ABOUT 300 NM SE OF MIA AND ELECTED TO RETURN PER OUR OPS MANUAL. RETURN TO BASE WAS UNEVENTFUL, AND WE TAXIED TO THE GATE UNASSISTED.

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.