As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
ETOPS SIGNIFICANT SYS - FO ADI AND HSI ARE BLANK. SELECTING ALTERNATE EFI CORRECTS THE FAULT. (THE INSTRUMENT WENT BLANK AT ABOUT 1100 FT ON APPROACH. PRIMARY DISPLAY RETURNED AFTER RESELECTING FROM ALTERNATE). CONFIRMED SECURITY OF RT SYMBOL GENERATOR, ACCOMPLISHED FIM 34-22-00 FIG 108. SYS TEST NORMAL. OK TO CONTINUE IN SERVICE.