As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
CAPTAIN`S ADI AND HSI WENT BLANK WITH SG FAIL MESSAGE DISPLAYED IN BOTH INDICATORS. CYCLED "ALTN EFI" OPS RETURNED TO NORMAL/GOOD. R & R NR 1 SYMBOL GENERATOR, GROUND CHECKED OK IAW AMM 34-22-01, GROUND TEST 30 PASSED. ACFT REMAINS IN LAND 3 STATUS.