As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
WHILE PERFORMING OPS CHECK OF THE HORIZONTAL STAB SYSTEM IT WAS NOTED THAT THE SYSTEM ONLY WORKS IN CHANNEL 1 BUT NOT ON CHANNEL 2. TROUBLESHOOTING LEAD TO DEFECTIVE WIRING ON CONNECTOR P12 SOCKETS DD AND EE. SOCKETS SHOWED EVIDENCE OF ARCING AT SOCKET TO WIRE CONNECTION. REPAIRED WIRING, REPLACED CONNECTOR AND SOCKETS.