As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
PRIMARY TRIM: AT 300 KNOTS AMBER CASS "RETRIM NOSE DOWN" ILLUMINATED. WHEN SLOWING BELOW 300 KNOTS, CASS MESSAGE EXTINGUISHED AND STAB TRIM MOVEMENT WAS OBSERVED. IT APPEARS THAT AT 300 KNOTS, THE AIRPLANE IS RUNNING OUT OF TRIM AND REACHING ITS MAX NOSE DOWN TRIM LIMIT. CORRECTIVE ACTION; REMOVED AND REPLACED PRIMARY TRIM ACTUATOR. PERFORMED STABILIZER TRIM POINTER RIGGING WITH REF TO CE680A MM 27-40-00. OPS CHECK GOOD. RESECURED ALL PANELS.