What was found
DURING CRUISE FLIGHT THE AUTO PILOT FAILED AT FL28. EXCESSIVE INPUT FORCE WAS REQUIRED FOR AILERON CONTROL, FLIGHT WAS DIVERTED TO IAD AND LANDED SAFELY. REPLACED THE LEFT OUTBOARD SPOILERON POWER CONTROL UNIT.
As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
DURING CRUISE FLIGHT THE AUTO PILOT FAILED AT FL28. EXCESSIVE INPUT FORCE WAS REQUIRED FOR AILERON CONTROL, FLIGHT WAS DIVERTED TO IAD AND LANDED SAFELY. REPLACED THE LEFT OUTBOARD SPOILERON POWER CONTROL UNIT.