What was found
SHORTLY AFTER TAKEOFF, THE L/G AIR GROUND FAIL MESSAGE DISPLAYED, FOLLOWED BY ENGINE 1/2 REVERSE DISAGREE MESSAGES. INSPECTED NOSE AND MAIN WOW SWITCHES, ALL PASSED ELECTRICAL CHECK. R & R RELAYS K0352, K0353, AND K0453, OPS CHECKED GOOD IAW AMM 32-63-05-05. OPERATED BOTH THRUST REVERSERS, NO EICAS MESSAGES, OK FOR SERVICE.