As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
FLIGHT 1015, PHL-STT: ABOUT 20 MINUTES AFTER DEPARTURE, RIGHT ENGINE OIL QUANTITY INDICATION DROPPED TO ZERO. OIL PRESSURE REMAINED NORMAL. FLIGHT RETURNED TO PHL. MAINTENANCE REPLACED THE RIGHT OIL QUANTITY TRANSMITTER. NO FURTHER FAULTS.