As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
DURNG TAXI, FLT CREW RECEIVED NR 3 ENGINE VIBRATION MONITORING (EVM) COMPRESSOR HIGH ALERT. FLIGHT CREW ELECTED TO RETURN TO GATE. A/C RETURNED TO GATE WITHOUT FURTHER INCIDENT. MAINTENANCE TROUBLESHOOTING FOUND NR 3 ENGINE (EVM) HARNESS FAULTING. PART NOT IN STOCK, ASSIGNED DMI M77MA16-25 PER MEL 77-32-1. PART WILL BE REPLACED WHEN AVAILABLE. A/C RETURNED TO SERVICE. (M)