As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
ACTUATOR CONFIDENCE FAILED. MSG 27-10110, ELEVATOR POWER CONTROL UNIT (LEFT OUTBOARD) BLOCKING SOLENOID OPERATED VALVE IS NOT IN COMMANDED POSITION. AFTER EXTENSIVE TROUBLESHOOTING FOUND FAULTY L1 ACE. REPLACED L1 ACE, OP CHECK GOOD. AC OK FOR SERVICE.