As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
ETOPS SIGNIFICANT SYS - FMC BOTH WHILE IN ATC MODE ON ATC INDEX PAGE PRINTING IS ILLUMINATED ON ATC LOG PAGE. ALL INFO UPLINK WILL NOT PRINT, L6 INDICATES PRINT BUSY. CANNOT DUPLICATE ATC LOGGED IN CONDITION ON GROUND. FMC CHECKED GOOD IAW AMM 34-61-00-735-007. ACARS PRINTER CHECKED GOOD IAW 23-22-03-40-1.