What was found
CREW REPORTED ON CLIMB OUT THAT THEY RECEIVED LDG AIR/ GROUND FAIL MESSAGE AFTER THEY RETRACTED GEAR. GOT 3-GREEN LIGHTS. LND/AIR GROUND MESSAGE DID NOT GO AWAY WHEN GEAR LEVER WAS RETRACTED. T/R DISAGREE MESSAGE ON EICAS BUT MESSAGE WENT AWAY WHEN GEAR WAS LOWERED. CREW DECLARED EMERGENCY AND LANDED WITHOUT INCIDENT. AIRCRAFT REMOVED FROM SERVICE. C/A - REMOVED AND REPLACED RT MLG WOW 1 AND 2 PROX SWITCH. FOUND NLG WOW PROX HARNESS CONNECTOR CORRODED. REMOVED AND REPLACED PROX HARNESS REF ERJ AMM 32-63-01. AIRCRAFT RETURNED TO SERVICE. (K)