As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
AFTER TAKEOFF, THE MACH TRIM YAW DAMPER AND AUTO-PILOT WOULD NOT ENGAGE ON THE FGC PANEL. REPAIRED BROKEN WIRES AT LAFGS ANNUNCIATOR TRANSFER BUTTON. CLEANED BUTTON CONTACTS IAW ARKANSAS AERO DWG A1-44-001 REV B AND A1-44-003 REV B. OPERATIONAL CHECK SATISFACTORY.