As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
ACE MONITOR TEST FAILED MSG27-13004. FOUND ACTIVE MESSAGE 27-10116. LT INBD ELEVATOR PCU PRESSURE REDUCER SOLENOID OPERATED VALVE IS NOT IN COMMANDED POSITION. TRIED NEW ACE- NO HELP. VERIFIED 28 VDC AT PCU CONNECTOR IAW FIM. IAW FIM WIRE CHECKS OK FROM ACE M27121, B15 TO PCU M27112 PIN 6. WIRE 1542-22 CHECKS OK FROM ACE M27121 B4 TO PSA M24101 INSERT 28. LT INBD ELEVATOR PCU REPLACED IAW MM.