A320 captain reported a failure of an aileron servo led to right wing oscillations above 280 knots.

Attributes
ACN	1459355
Time
Date	201706
Local Time Of Day	0601-1200
Place
Locale Reference	ZZZ.ARTCC
State Reference	US
Aircraft 1
Make Model Name	A320
Operating Under FAR Part	Part 121
Flight Phase	Climb
Flight Plan	IFR
Component
Aircraft Component	Aileron Control System
Person 1
Function	Captain
Qualification	Flight Crew Air Transport Pilot (ATP)
Events
Anomaly	Aircraft Equipment Problem Critical

Narrative:

On climb out above 10000 ft and accelerating right wing began oscillating and shaking the aircraft dramatically above 280 knots. We [contacted ATC] and said we would like to return to the airport of departure. Upon slowing the aircraft below 250 knots the oscillation stopped. We burned 2000 lbs of fuel to get to landing weight and landed uneventfully. Right aileron servo had failed.

Original NASA ASRS Text

Title: A320 Captain reported a failure of an aileron servo led to right wing oscillations above 280 knots.

Narrative: On climb out above 10000 ft and accelerating right wing began oscillating and shaking the aircraft dramatically above 280 knots. We [contacted ATC] and said we would like to return to the airport of departure. Upon slowing the aircraft below 250 knots the oscillation stopped. We burned 2000 lbs of fuel to get to landing weight and landed uneventfully. Right aileron servo had failed.

Data retrieved from NASA's ASRS site 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.