What was found
FLT 4152, IAD-BOS, UPON LANDING GEAR EXTENSION, BRK CONTROL FAULT LG LEVER DISAG, RIGHT MAIN LANDING GEAR DISPLAYED UNSAFE INDICATION. ALL INDICATIONS RETURNED TO NORMAL WITHIN 1 MINUTE. CYCLED GEARS MANY TIMES AND COULD NOT DUPLICATE FAULT, AS PRECAUTIONARY REMOVED AND REPLACED RT MLG UPLOCK ACT ASSY WITH 2 EACH NEW SENSORS ALREADY INSTALLED PER MM 32-31-03. ALSO LUBED MLG UPLOCK ROLLER ASSY PER CMM 32-11-14 MLG SHOCK STRUT PER EMBRAER TECH SUPPORT ENGINEER. OPS CHECKED MANY TIMES, NO FAULTS FOUND. A/C OK FOR CONTINUED SERVICE PER EMBRAER I/C 2008-190/02336A.