A321
Flight Crew Air Transport Pilot (ATP)
Situational Awareness
Aircraft Equipment Problem Critical; Deviation / Discrepancy - Procedural Published Material / Policy
Flight Crew Rejected Takeoff; Flight Crew Returned To Gate; General Maintenance Action; General Flight Cancelled / Delayed
Aircraft; Weather; Human Factors
I am submitting this ASAP on the recommendation of the FOQA gatekeeper. Crew was cleared for takeoff. Shortly after applying TOGA thrust; ECAM displayed an N1 overspeed master caution on the number 2 eng. Captain rejected takeoff and exited the runway. Clear of runway the crew explained to the tower the reason for the reject. The crew then shut down the number 2 eng and called mx with the failure. Mx requested we return to the gate. At the gate the captain wrote up the discrepancy in the maintenance log. Both the captain and the first officer thought the a/c was below 80 kts. At the point of the reject. The gate keeper advised the crew [two weeks later] that the actual airspeed was 90 kts with a ground speed of 66 kts. The warning happened just below 80 kts and by the time the captain pulled the power back the a/c accelerated to 90 kts. The captain looked away from the airspeed indicator when the failure occurred so he did not see the speed. The crew thought they were less than 80 kts due to the 24 kt headwind.
We were cleared for takeoff; I was Pilot Flying; I selected TOGA thrust to begin takeoff roll; the engines accelerated normal to TOGA and we began rolling; then almost immediately we got an ECAM for 'Engine 2 N1 over speed' Captain then rejected takeoff by pulling power to Idle and I notified tower of our Reject. We were at a low speed requiring very light braking no reverse; and exited the runway to the right. We went to ground control and were asked reason for the reject; which I responded 'Engine N1 over speed'; we then notified Maintenance and [were] told to return to gate; I notified Ramp control and got taxi clearances to the return gate. I believe the ramp asked if it was a high speed reject and if anyone was hurt; I stated 'it was low speed and everyone was fine no assistance was needed.' At gate Captain entered it in logbook; and conferred with maintenance personnel.
A321 flight crew reported observing a #2 engine N1 overspeed warning during the takeoff roll. The Captain aborted the takeoff and returned to the gate for maintenance. This event was originally thought to be a low speed abort; however the takeoff was actually rejected at 90 knots.