B737-800 captain reported a rejected takeoff due to an N1 compressor overspeed on both engines.

Attributes
ACN	1474675
Time
Date	201708
Local Time Of Day	1201-1800
Place
Locale Reference	ZZZ.Airport
State Reference	US
Environment
Flight Conditions	VMC
Light	Daylight
Aircraft 1
Make Model Name	B737-800
Operating Under FAR Part	Part 121
Flight Phase	Takeoff
Flight Plan	IFR
Component
Aircraft Component	Compressor
Person 1
Function	Captain Pilot Flying
Qualification	Flight Crew Air Transport Pilot (ATP)
Events
Anomaly	Aircraft Equipment Problem Critical

Narrative:

[On takeoff] experienced N1 compressor overspeed indications on both engines at 100 kias with toga power indicated on flight mode annunciation and APU bleed on. A rejected takeoff was executed and aircraft returned to gate for maintenance inspection. Cause not determined at this time.

Original NASA ASRS Text

Title: B737-800 Captain reported a rejected takeoff due to an N1 compressor overspeed on both engines.

Narrative: [On takeoff] experienced N1 compressor overspeed indications on both engines at 100 kias with TOGA power indicated on Flight mode annunciation and APU bleed ON. A rejected takeoff was executed and aircraft returned to gate for maintenance inspection. Cause not determined at this time.

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.