As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
NUMBER 4 HYD FLOW BAR ILLUMINATED WITH NO PRESS ON SYS. FLOW BAR DISAPPEARS WHEN EDP SWITCH COMMANDED TO THE OFF POSITION. TRIED NEW PANEL FROM ANOTHER ACFT PROBLEM STILL REMAINS. NR 4 ENG EDP PRESS SWITCH REPLACED. ALSO ADP PRESS SWITCH AS A PRECAUTION.