As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
CREW REPORTS NR 1 ENGINE OIL QUANTITY WENT TO '0'. ENGINE SHUTDOWN AND WINDMILLED FOR APPROX 30 MINUTES. OIL PRESSURE DURING WINDMILL 4-6 PSI. SUPPLEMENTAL DATA UPDATE: ANGLE GEARBOX OIL PRESSURE LINE CRACKED CAUSING LOSS OF OIL QUANTITY. REPLACED OIL PRESSURE LINE.