As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
AIRCRAFT WAS GROUNDED: ON APPROACH INTO ORD THE FLIGHT CREW REPORTED A LOSS OF AIRSPEED INDICATION DUE TO THE SPEED BUG INTERMITTENTLY FROZEN ON FLIGHT CONTROL UNIT. UNABLE TO CONTROL WITH AUTOTHRUST ENGAGED. AN EMERGENCY WAS DECLARED AND THE AIRCRAFT LANDED SAFELY WITHOUT FURTHER INCIDENT. ACCOMPLISHED FLIGHT FAULT REVIEW AND NO FAULTS FOUND. REPLACED FLIGHT CONTROL UNIT (FCU) PER AMM 22-81-12. ALL TESTS NORMAL. ACCOMPLISHED OPERATIONAL CHECK OF AUTO THRUST PER AMM 22-30-00. ALL TESTS NORMAL. ACCOMPLISHED LAND TEST PER AMM 22-97-00. ALL TESTS NORMAL.