As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
(CAN) TOP OF DESCENT, THE NR 1 LOW OIL PRESSURE LIGHT ILLUMINATED, QTY AT ZERO. PRECAUTIONARY ENGINE SHUTDOWN CARRIED OUT. GEARBOX FITTING (OIL PRESSURE DIFFERENTIAL SWITCH) THREAD REPAIRED AND FITTING REPLACED. ENGINE INSPECTEED IAW MM AND RETURNED TO SERVICE. (TC NR 20070727004)