What was found
DISC: PILOT REPORTED EICAS MESSAGES AIR/GROUND FAIL, SPOILER FAIL AND ENG 1-2 REVERSE DISAGREE. GEAR WAS UP WHEN MESSAGES APPEARED. MESSAGES STAYED ILLUMINATED UNTIL 200 FEET AGL ABOVE THE LANDING RUNWAY WHEN THEY EXTINGUISHED.
CORRECTIVE ACTION: PERFORMED EMB 135 FIM TASK 32-63-00-810-804-A; SUBTASK 817-011-A, VERIFIED LANDING GEAR SERVICING AND ADJUSTED IN REF TO EMB 32-10-02; SUBTASK 817-019-A, FOUND NLG DOWNLOCK PROX SWITCHES OUT OF ADJUSTMENT AND BOTH MLG WOW PROX SWITCHES OUT OF ADJUSTMENT. COMPLIED WITH ADJUSTMENT CHECKS IN REF TO EMB 135 MM 32-63-01; COMPLIED WITH BLOCK 11, REPLACEMENT OF LEGU REFERENCE SNAG 7JX-210628-556; ALL OPERATION CHECKS GOOD IN REF TO EMB 135 MM 32-30-00; AIRCRAFT REQUIRES AN OPERATIONAL CHECK FLIGHT PER GMM, REFERENCE SNAG 7JX-210629-559. PILOT VERIFIED GEAR INDICATION HAD ALL THREE GREEN AND TR'S DEPLOYED WHEN ACTIVATED AFTER AIRCRAFT LANDED WITHOUT FURTHER INCIDENT.