As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
DURING TAXI OUT, THE RIGHT ENGINE OIL QUANTITY AND PRESSURE INDICAITON DROPPED TO ZERO. CREW SHUT DOWN THE RIGHT ENGINE AND RETURNED TO GATE. MAINTENANCE REPLACED DAMAGED STUD ON THE RIGHT ENGINE OIL FILTER COVER. COVER AND FILTER WERE REINSTALLED AND ENGINE WAS SERVICED, OPERATIONAL CHECK OK.