A321
Flight Crew Multiengine; Flight Crew Air Transport Pilot (ATP); Flight Crew Instrument
Aircraft Equipment Problem Critical; Deviation / Discrepancy - Procedural Published Material / Policy; Deviation / Discrepancy - Procedural Clearance
Flight Crew Diverted
Aircraft
At FL270 engine #2 N1 vibration exceeded 7.5 per QRH we disconnect autothrust and placed engine to idle for remainder of flight. Diverted to [an alternate airport].
A321 flight crew reported observing an engine vibration indication; resulting in a diversion to an alternate airport.