As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
FLIGHT 3054, BUF TO BOS - THE FLIGHT CREW RECEIVED A LANDING GEAR AIR/GROUND FAIL MESSAGE ON TAKEOFF. THE AIRCRAFT RETURNED TO BUF AND LANDED WITHOUT INCIDENT. MAINTENANCE FOUND CMC MESSAGES FOR LGEU FAIL AND PROX SWITCH FAIL. AN AIR/GROUND TEST WAS PERFORMED AND FLAGGED THE NR 1 WOW PROX SWITCH ON THE RIGHT MAIN LANDING GEAR. THE PROX SWITCH WAS DEFERRED AND THE AIRCRAFT WAS RELEASED FOR SERVICE. THE DEFERRAL WAS CLEARED IN SDF ON 4/8/2009 WHEN THE PROX SWITCH WAS REPLACED.