As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
FLT#62, PBI-LGA. (AIRCRAFT PERFORMED AN AIR TURN BACK TO PBI) ' AT FL 280 MAP NOT AVAILABLE AUTO THR OFF, NO FLIGHT DIRECT A/P OFF. RAN CK LIST ADV MX . RETURNED TO PBI; ACCOMPLISHED TSM 22-11-00-810 REMOVED AND REPLACED FMGC 1 SYS OPS CHECK NORM AMM 22-83-34.'