As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
CREW REPORTED; AFTER TAKEOFF AMBER EICAS. LG AIR/GND FAIL COMES ON, , CLIMBING OUT OF 2 TO 3000 FEET AMBER ENG 1-2 REV DISAGREE COMES ON. FOLLOWED QRH, ON LANDING WITH GEAR DOWN. ALL AMBER LIGHTS GOES OUT. NORMAL BRAKING REVERSE & NO OTHER INDICATIONS. CORRECTIVE ACTION; MX FOUND NLG INTERMITTENT PROX SENSOR. MX REMOVED AND REPLACED NLG PROX SENSOR ALL OPS TESTS GOOD. MX CND THE ENG 1-2 REV DISAGREE. AIRCRAFT RETURNED TO SERVICE.