As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
GSO - FL1267 - ON CLIMB-OUT FOR GSO AT APPROXIMATELY 6,000 FEET, THE NR 1 ENGINE OIL QTY GAUGE SLOWLY DROPPED TO ZERO. CREW CALLED GSO TOWER AND DECIDED TO RETURN TO FIELD. AS THE FLIGHT GOT CLOSER TO GSO, THE NR 1 ENGINE OIL QTY GAUGE STARTED TO CLIMB BACK TO 1. FLIGHT LANDED WITHOUT FURTHER INCIDENT. THE NR 1 ENGINE WAS NOT SHUT DOWN AND NO EMERGENCY WAS DECLARED. MAINTENANCE REMOVED AND REPLACED THE NR 1 ENGINE OIL QTY INDICATOR. OPERATIONAL CHECK GOOD. (M)