V2500 N1 Vibration Overlimit at Takeoff
Query specially directed to Pilots of A320 family with V2500 engines.
There was an inflight shutdown & diversion on an A320 aircraft operated by Airblue in Pakistan about a week earlier. One Fan blade was fractured, ingested into the core destroyed complete engine. Apparently there was high N1 vibration approx 5.2 aircraft units at the time of takeoff run at about 40 knots. This was ignored though the max allowable limit is 5 units. Incident happens at FL30 thirty minutes into the flight.
What is the normal procedure if such an advisory appears during takeoff? ABTO or continue flight as carred out in this incident?