As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
RECEIVED RT ENGINE OIL PRESSURE MASTER WARNING ON DESCENT, 3 TIMES COMPLIED WITH QRH OIL PRESSURE INDICATED 63 PSI. REMOVED AND REPLACED RT ENGINE LOW OIL PRESSURE SWITCH IAW AMM 79-31-03. OPS CHECK LEAK CHECK GOOD. RAN ENGINE AT ALL POWER SETTINGS. NO FAULTS NOTED, NO OIL ADDED. (K)