As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
PIT - FLT 732 - ON SHORT FINAL, NR 1 ENGINE OIL QUANTITY WENT TO ZERO. OIL PRESSURE FLUCTUATED 35 - 45 PSI, OIL PRESSURE LIGHT FLICKERED ON. UPON LANDING, OIL QUANTITY WAS ZERO, OIL PRESSURE WAS 20 SPI, OIL LIGHT WAS ON. CREW SHUT DOWN NR 1 ENGINE. FOUND LP 5 FITTING STRIPPED OUT OF GEARBOX. REPLACED NR 1 ENGINE GEARBOX PER M/M 72-60. NO LEAKS NOTED ON POST CHANGE ENGINE RUN. (X)