As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
DURING CLIMB OUT THROUGH FL230 , MASTER WARNING ILLUMINATED WITH NO ASSOCIATED ANNUNCIATORS. LEFT AND RIGHT ENGINE OIL PRESSURES FLUCTUATED AND DROPPED THEN STABILIZED TWICE. ALL OTHER INDICATORS WERE GREEN. MAINTENANCE PERFORMED THE REQUIREMENTS OF SB72-30440 . SEVERAL SUCCESSFUL OPERATIONAL CHECK FLIGHTS PERFORMED. AIRCRAFT WAS RETURNED TO SERVICE.