A321 flight crew reported observing a #2 engine N1 overspeed warning during the takeoff roll. The ca...

Attributes
ACN	1323359
Time
Date	201512
Local Time Of Day	0601-1200
Place
Locale Reference	ZZZ.Airport
State Reference	US
Environment
Flight Conditions	VMC
Light	Daylight
Aircraft 1
Make Model Name	A321
Operating Under FAR Part	Part 121
Flight Phase	Takeoff
Flight Plan	IFR
Component
Aircraft Component	RPM/N1/N2/Etc Indication
Person 1
Function	Pilot Not Flying Captain
Qualification	Flight Crew Air Transport Pilot (ATP)
Person 2
Function	Pilot Flying First Officer
Qualification	Flight Crew Air Transport Pilot (ATP)
Events
Anomaly	Aircraft Equipment Problem Critical Deviation - Procedural Published Material / Policy

Narrative:

I am submitting this as soon as possible 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.

Original NASA ASRS Text

Title: 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.

Narrative: 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.

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.

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.