As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
FLIGHT DECK PERSONNEL REPORTED, LEFT ENGINE LOST ALL OIL QUANTITY, MINUTE LATER OIL PRESSURE LIGHT CAME ON, SHUT ENGINE DOWN OIL PRESSURE WENT TO 25 BEFORE SHUT DOWN. ENGINE WINDMILLED FOR 20 MINUTES. MAINTENANCE PERSONNEL REMOVED AND REPLACED THE LEFT ENGINE OIL PRESSURE DIFFERENTIAL SWITCH AND OIL LINE IAW 79-35-01 AND AMM 20-12-02 OPERATIONAL CHECK NORMAL. AIRCRAFT RETURNED TO SERVICE.