As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
NR 2 ENGINE OIL QUANTITY DROPPED TO ZERO AND WHEN OIL PRESSURE DROPPED BELOW RED RADIAL ENGINE WAS SHUT DOWN. OIL TEMP WAS NORMAL. SINGLE TIME WAS ABOUT TEN MINUTES. WITH ENGINE SHUT DOWN ABOUT 10 PSI WAS NOTED ON GAUGE. TROUBLE SHOT NR 2 ENGINE, REMOVED AND REPLACED RN 2 ENGINE ACCESSORY GEAR BOX IAW PWA MANUAL 72-61-00 RUN UP, OPS AND LEAK CHECK GOOD. (M)