As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
(CAN) AFTER AN ENGINE SHUT DOWN DUE TO LOW ENGINE OIL PRESSURE, HYDRAULIC POWER TRANSFER UNIT FAILED TO PRESSURIZE THE NR 2 HYD SYSTEM, EMERGENCY LANDING GEAR EXTENSION PERFORMED AND AC LANDED SAFELY. THIS IS STILL UNDER INVESTIGATION, HYDRAULIC SYSTEM FLUID WAS ANALYZED AND FOUND CONTAMINATED WITH METAL PARTICLES. PTU WAS REPLACED AND HYD SYSTEM FLUSHED. WAITING FOR THE SHOP STRIP REPORT TO DETERMINE NATURE OF THE PTU FAILURE.