What was found
F/O CDU DISPLAY BLANK. SELECTING ALT SOURCE DID NOT CORRECT THE PROBLEM. REPLACED F/O FMC CDU PER MM, GROUND TEST NORMAL.
As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
F/O CDU DISPLAY BLANK. SELECTING ALT SOURCE DID NOT CORRECT THE PROBLEM. REPLACED F/O FMC CDU PER MM, GROUND TEST NORMAL.