As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
RED TRIM ANNUNCIATOR ILLUMINATED CONTINUOUSLY DURING ALL MODES OF FLIGHT, CLIMB, CRUISE AND DESCENT. THE LIGHT WOULD ILLUMINATE SHORTLY AFTER AP WAS ENGAGED. WE VERIFIED AIRCRAFT WAS PERFECTLY TRIMMED PRIOR. THE AP KEPT ADDING NOSE-UP TRIM, EVEN WHEN NOT REQUIRED. OPEN