As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
DURING INITIAL APPLICATION OF TAKEOFF POWER, FLIGHT CREW RECEIVED NR 1 ENGINE OIL BYPASS ALERT. AIRCRAFT RETURNED TO GATE WITHOUT FURTHER INCIDENT. MAINTENANCE PERSONNEL REMOVED AND REPLACED FILTER ELEMENT. LEAK AND OPERATIONAL CHK'D OK ON ENGINE RUN. AIRCRAFT RETURNED TO SERVICE. (X)