As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
DURING DESCENT INTO MMSL CREW NOTICED OIL PRESSURE FLUCTUATING AND DROPPED TO 50 PSI AS A PRECAUTION CREW SHUTDOWN RH ENGINE, NO EMERGENCY DECLARED, AIRCRAFT LANDED WITHOUT INCIDENT. WAITING ON MX TO SHOW UP AND TROUBLESHOOT OIL PRESSURE ISSUE.