As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
AIRCRAFT WAS NOT GROUNDED: AT TAKE OFF PLUS 3:45 HED ON ND WARNING "OFF SIDE FM CONTROL" AT FL 330. "NAV" TRANSITIONED TO "HEADING" UNCOMMANDED. REVIEWED QRH PAGE 3-4 AND SWITCHED TO AUTO PILOT#2. PROBLEM SELF CLEARED AND RETURN TO AUTO PILOT #1. RESET FMGC 1 AND 2 PER AMM 22-96-00, PERFORMED AUTO FLIGHT SYSTEM CHECK WITH NO DEFECTS NOTED.