What was found
ON APPROACH, AIRSPEED BUG BECAME UNRESPONSIVE TO MCP PANEL INPUT. TURNED OFF FLIGHT DIRECTORS AND REGAINED AIRSPEED BUG FUNCTION. ACFT GROUNDED. COULD NOT DUPLICATE, NO LOGGED FAULTS, SYSTEM TESTS GOOD IAW AMM 22-00-01-730-801.
As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
ON APPROACH, AIRSPEED BUG BECAME UNRESPONSIVE TO MCP PANEL INPUT. TURNED OFF FLIGHT DIRECTORS AND REGAINED AIRSPEED BUG FUNCTION. ACFT GROUNDED. COULD NOT DUPLICATE, NO LOGGED FAULTS, SYSTEM TESTS GOOD IAW AMM 22-00-01-730-801.