As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
(CAN) MFD FAIL TO COME ON WHEN ACFT MASTER SWITCH TURNED ON. DC-DC CONVERTER REPLACED - SAME PROBLEM OCCURED AT 102.6 AIRFRAME HRS. - 66 AIRFRAME CYLES, AND DC-DC CONVERTER REPLACED AGAIN (33 HRS + 19 CYCLES) MFG IS AWARE OF THE POOR QUALITY OF THE RR18 DC-DC CONVERTERS.