As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
ON PREFLIGHT CHECK RED BOX AROUND ENGINE NR 1 DIGITAL. GROUNDED YES. R&R NR 1 ENGINE PER T/C'S 78471000 AND 78471001 NO RED BOX NOTED ON N1 DISPLAY. ETOPS P/N CHANGE VERIFIED WITH MX CONTROL REF. IPC 72-00-00-01. FVR FLIGHT SUCCESSFUL.