As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
AIRCRAFT RETURNED TO GATE DUE TO ENG 2 OVSPD PROT FAULT IN TAXI OUT. PFR SHOWS MSG FMU E2-4071KS, SOV POS TSM 73-21-72-810-692A, PERFORMED SUCCESSFULLY. ENG 2 RUN UP AT IDLE BY CREW WITH NO FAULT MSG. ACFT SERVICEABLE FOR REVENUE FLIGHT. ACFT RETURNED TO STAND AT 16:58 DEPARTED AT 1804.