As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
AFTER TAKEOFF, CLIMBING THROUGH 12 THOUSAND OIL QUANTITY CAME DOWN TO 2 GALLONS, FOLLOWED BY OIL PRESSURE LIGHT. PERFORMED ABNORMAL CHECK LIST NR 4 ENGINE OFF (SHUTDOWN). CAME BACK TO SAN SALVADOR WITHOUT ANY MORE ABNORMALITIES. PREPARED NR 4 ENGINE FOR FERRY FLIGHT IAW ARROW AIR GENERAL MAINTENANCE MANUAL PAGE 6-3-4 AND PAGE 6-3-5. REMOVED AND REPLACED NR 4 ENGINE, OPERATIONS AND LEAK CHECK NORMAL.