As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
(CAN) DURING THE LAST FLIGHT OF THE DAY THE LT INDICATOR LIGHT ON THE INSTRUMENT PANEL CAME ON, INDICATING THAT THE VACUUM PUMP HAD FAILED. AFTER LANDING, MAINTENANCE FOUND THAT THE SHAFT HAD BROKEN. RECEIVED OH PUMP NEXT MORNING INSTALLED, GROUND RUN NO FAULTS FOUND.