As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
AIRCRAFT NOSE PITCHES DOWN ABNORMALLY FAST AND STEEP WHEN USING THE A/P ROCKER SWITCH TO NOSE DOWN. NORMAL PITCH CHANGE WHEN ROCKING UP. DEFERRED PER MEL 22-11-1, MC 021. REMOVED AND REPLACED APP-65A CONTROL PANEL. SYSTEM OPS CHECK GOOD IAW EMB120 MM CHAPTER 22-10-04.P/N: 622-6684-006 S/N ON: 2255 S/N OFF: 1689.