As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
DURING CRUISE FLIGHT AT 11,000 FT, THE ENGINE OIL PRESSURE FLUCTUATED BETWEEN 85 AND 95 PSI. DIVERTED AND DECLARED AN EMERGENCY. THE AIRCRAFT LANDED WITH NO FURTHER INCIDENT. THE OIL PRESSURE GAUGE WAS REPLACED IAW MM 79-30-00 AND THE AIRCRAFT RETURNED TO SERVICE.