As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
THE EMER STAB TRIM WAS INTERMITTENTLY WORKING IN THE DOWN POSITION. TROUBLESHOOTING FOUND THE EMER TRIM SWITCH TO BE FAILING & REQUIRED REPLACEMENT. THE DEFECTIVE SWITCH WAS REMOVED & A NEW SWITCH INSTALLED. FUNCTIONAL CHECKS WERE SATISFACTORY.