An A330 ECAM alerted automatic flight a/T off; engine 2 EPR mode fault; N1 degraded mode; do not exc...

Narrative:

While in cruise FL310 just ECAM message: automatic flight a/T off; engine 2 EPR mode fault; N1 degraded mode; do not exceed N1 limit. Man thrust adj. Captain assigned flying duties to first officer and performed ECAM actions. We contacted the dispatcher and maintenance control and were advised to return to field. We descended to 14;000 ft to burn as much fuel as possible before arrival at our departure airport. Due to split thrust lever position and since it was day VFR we decided to land overweight as a precautionary measure and declared an emergency with equipment for the overweight landing. The landing was made with less than 300 ft/min sink rate and uneventful. Loss of some probes in both engines was reported to us by maintenance.

Original NASA ASRS Text

Title: An A330 ECAM alerted AUTO FLT A/T OFF; ENG 2 EPR MODE FAULT; N1 DEGRADED MODE; DO NOT EXCEED N1 LIMIT; MAN THRUST ADJ. The aircraft was returned to the departure airport where EPR probes on both engines were found failed.

Narrative: While in Cruise FL310 just ECAM MESSAGE: AUTO FLT A/T OFF; ENG 2 EPR MODE FAULT; N1 DEGRADED MODE; DO NOT EXCEED N1 LIMIT. MAN THRUST ADJ. Captain assigned flying duties to First Officer and performed ECAM actions. We contacted the Dispatcher and Maintenance Control and were advised to return to field. We descended to 14;000 FT to burn as much fuel as possible before arrival at our departure airport. Due to split thrust lever position and since it was day VFR we decided to land overweight as a precautionary measure and declared an emergency with equipment for the overweight landing. The landing was made with less than 300 FT/min sink rate and uneventful. Loss of some probes in both engines was reported to us by Maintenance.

Data retrieved from NASA's ASRS site as of April 2012 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.

Attributes
ACN	948597
Time
Date	201105
Local Time Of Day	1201-1800
Place
Locale Reference	ZZZ.ARTCC
State Reference	US
Environment
Light	Daylight
Aircraft 1
Make Model Name	A330
Operating Under FAR Part	Part 121
Flight Phase	Cruise
Flight Plan	IFR
Component
Aircraft Component	Engine Pressure Ratio Indicat
Person 1
Function	Captain Pilot Flying
Qualification	Flight Crew Air Transport Pilot (ATP)
Events
Anomaly	Aircraft Equipment Problem Critical

An A330 ECAM alerted automatic flight a/T off; engine 2 EPR mode fault; N1 degraded mode; do not exceed N1 limit; man thrust adj. The aircraft was returned to the departure airport where EPR probes on both engines were found failed.