As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
PILOT SQUAWKED "PITCH KNOB AUTO PILOT PANEL WORKS IN REVERSE" ON FLIGHT LOG PAGE. A PITCH UP COMMAND RESULTED IN A PITCH DOWN CONDITION AND A PITCH DOWN COMMAND RESULTED IN A PITCH UP CONDITION. MAINTENANCE CONFIRMED DEFECT ON GROUND. PANEL WAS CORRECTLY ORIENTED IN ITS INSTALLATION. PART WAS REPLACED WITH A KNOWN GOOD A/P CONTROL PANEL AND OPERATIONAL CHECK WAS SATISFACTORY.