As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
LT ENGINE OIL PRESSURE ANNUNCIATOR ILLUMINATED, MASTER WARNING ILLUMINATED. OIL PRESSURE FELL BELOW 20 PSI THEN CAME BACK UP AND HOVERED AT 40 PSI, SHUT ENGINE DOWN NOTICED NO OIL IN SIGHT GAUGE. DETERMINED THAT THE LT ENGINE WAS BURNING OIL INTERNALLY, REPLACED ENGINE IAW MM CHAPTER 72-00.