As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
THE FLIGHT CREW REPORTED THAT PILOTS SIDE PRIMARY FLIGHT DISPLAY POWERS UP WHEN AIRCRAFT BATTERY SWITCH IS TURNED TO THE ON POSITION. THE MAINTENANCE TEAM TROUBLESHOT AND DETERMINED THE LEFT AVIONICS CONTACTOR (KZ001) WAS AT FAULT. THE CONTACTOR WAS REPLACED WITH A NEW UNIT. OPS CHECKS WERE SATISFACTORY AND THE AIRCRAFT WAS RETURNED TO SERVICE.