As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
(CAN) INCIDENT DETAILS: JUST BEFORE TOP OF DESCENT FMGC 2 FAILED, FMGC 1 WAS ALREADY UNSERVICEABLE AND ON MEL RELIEF. THE CREW DECLARED PAN PAN AND AN UNEVENTFUL LANDING WAS CARRIED OUT. NIL ADVERSE REACTION WAS REPORTED BY THE CAPTAIN. RESOLUTION FMGC #1 (FLIGHT MANAGEMENT & GUIDANCE COMPUTER) REPLACED PER 22-83-34-PB401