As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
DURING CLIMB OUT AT 16K FEET, ENGAGED AP 1 & RECEIVED STAB OUT OF TRIM LEVEL 2. RAN QRH & LEVEL 2 DID NOT GO AWAY. TRIM SEEMED TO BE MOVING ON AP1, BUT LEVEL 2 WAS STILL THERE, ON AP 2 THE AUTOPILOT WOULD DISENGAGE. AFTER LANDING LEVEL 1 SEL LSAS RIB OFF & SEL LSASL LOB OFF CAME ON. REPLACED BOTH FCC 1 AND FCC 2 IAW MM 22-01-03-4. PERFORMED AUTOFLIGHT SYSTEM CAT RETURN TO SERVICE IAW MM 22-00-00-5.