As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
WHILE CLIMBING THROUGH 13,000 FEET OIL QUANTITY GAUGE ON NR 1 ENIGNE WAS IDENTIFIED AS LOSING OIL. TURNBACK TO MIA, PRIOR TO TURNBACK SWAPPED OIL GAUGES TO VERIFY OIL LOSS. ENGINE SHUT DOWN ALL AOM PROCEDURES COMPLIED WITH. FOUND OIL RETURN LINE TO GEAR BOX LEAKING, REPLACED PACKIGN AND HELI-COIL PER MM 79-20-0. OPERATIONAL CHECKED OK. HELI-COIL REPLACEMENT PER OHM 72-61-01. (M)