What was found
FLIGHT 4069, AFTER TAKEOFF, RECEIVED EICAS LG AIR/GND FAIL, E2 REV FAIL, E1-2 REV FAIL MESSAGE. COMPLIED WITH AOM CHECKLIST AND DECLARED AN EMERGENCY AND CFR WERE CALLED. LANDING SMOOTH, ON CENTERLINE AND NOT OVERWEIGHT. AS ACFT SLOWED DOWN, IT BECAME UNRESPONSIVE AND SWERVED RIGHT. BRAKES WERE NOT WORKING. ACFT DRIFTED ONTO A GRASSY AREA AND CAPTAIN HAD TO PULL EMERGENCY PARK BRAKE TO STOP. CREW SMELLED SMOKE, BUT CFR DID NOT DETECT FIRE. ACFT REMOVED FROM SERVICE. REMOVED AND REPLACED LT HAND MLG MAIN DOOR ASSEMBLY IAW AMM 32-10-06. REMOVED AND REPLACED LT MLG AUXILIARY DOOR IAW AMM 32-10-07. COMPLIED WITH EXTENSION CHECK OF LT LANDING GEAR IAW AMM 32-30-00. AIRCRAFT RETUTNED TO SERVICE.