As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
PDIS 647 27-41 2748311 12JAN22 CLT CLOSE ON CLIMB OUT PTRIM MAIN FAIL DISPLAYED ON EICAS. A/P DISCONNECTED AND WOULD NOT REENGAGE. BACK UP PITCH TRIM OPERATES NORMAL. 32880 00 AD FACT 12JAN22 23:54 CLT REMOVED AND REPLACED HSCU IAW REFERENCE TO AMM 27-40-01, OPS CHECK GOOD. AUTOPILOT OPS NORMAL, NO EICAS FAIL MESSAGES AT THIS TIME. OK FOR SERVICE