As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
AIRCRAFT WAS NOT GROUNDED: UPON SELECTING CMD A. THERE WAS A NOTEABLE PITCH DOWN DURING CLIMB OUT. VNAV WAS WAS ENGAGED. FLIGHT WAS OPERATED IN CMD B. WITH NO FURTHER ISSUES. TROUBLESHOT AUTO PILOT A PITCH FOUND FAULT CODE 22-11127 (ELEVATOR POSITION SENSOR. ACCOMPLISHED FIM 22-13-810-806 AND ALL SYSTEM OPERATIONAL CHECKS NORMAL.