As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
''TAKEOFF TRIM'' WARNING SOUNDS ON POWER LEVER ADVANCEMENT WITH TRIM INDEX WELL WITHIN GREEN ARC. INSPECTED OUT OF TRIM PROX SENSORS. BOTH FOUND GOOD. PERFORMED SEVERAL FUNCTIONAL CHECKS OF TRIM WARNING SYSTEM. ALL FOUND GOOD. UNABLE TO DUPLICATE DISCREPANCY.