As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
LOST OIL PRESSURE INDICATION ON NR 1 ENGINE FOLLOWED BY QUANTITY DECREASING. ENGINE WINDMILLED FOR 13 TO 14 MINUTES, NO PRESSURE INDICATED. FOUND OIL COOLER IN TUBE ASSY PULLED OUT OF GEARBOX. INSTALLED HELICOILS IN GEARBOX AND INSTALLED LINE, NO LEAKS NOTED.