As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
AFTER START, THE L NAV WOULD NOT ENGAGE AND THE AUTO THROTTLES WOULD NOT ARM AND ON MASTER CAUTION RECALL THE SPEED TRIM AND MACH TRIM LIGHTS ILLUMINATED. ACFT GROUNDED. FFR REVEALS MULTIPLY FCC "A" FAULTS. REPLACED FCC "A" IAW MM 22-11-33. GROUND VERIFICATION SUCCESSFUL, NO FAULTS NOTED.