What was found
AUTOPILOT PITCH TRIM CAUTION MESSAGE ENROUTE C/W QRH. REMOVED AND REPLACED HORIZ STAB SYS MCU IAW AMM 27-52-05. OPS CHECK GOOD. HSTCU BITE TESTS GOOD AT THIS TIME. (K)
As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
AUTOPILOT PITCH TRIM CAUTION MESSAGE ENROUTE C/W QRH. REMOVED AND REPLACED HORIZ STAB SYS MCU IAW AMM 27-52-05. OPS CHECK GOOD. HSTCU BITE TESTS GOOD AT THIS TIME. (K)