What was found
DURING APPROACH, AROUND 24,000 FEET, RECEIVED A HDG FLAG ON CAPTAIN`S SIDE FOLLOWED BY IRS NAV MODE FAIL. PROCEEDED TO PERFORM THE QRH. RECOVERED EVERYTHING FOLLOWED BY A SECONDARY FAIL, AP OFF, AT OFF, NO FLIGHT DIRECTOR. CYCLED AC POWER TO RESET SYSTEMS. BOTH IRUS OP CHECKED GOOD IAW AMM 34-26-00. AP OP CHECKING GOOD IAW AMM 22-11-01, AND 22-11-02. NO RECENT GRIPES. DURING LANDED RECEIVED AN AFCS FAULT ON EICAS. RESET SYSTEM. FAULT MESSAGE EXTINGUISHED. OP CHECKED GOOD IAW AMM 22-11-02, AND 22-11-01.