What was found
AFTER TAKEOFF LANDING GEAR WOULD NOT RETRACT POSITIVE RATE CALL ATTEMPTED TO RETRACT GEAR. LEVER WOULD NOT MOVE, APPROX. 3 SECONDS LATER LG WOW SYS FAIL EICAS MESSAGE APPEARED. RAN QRH CHECKLIST. MESSAGE CLEARED UPON TOUCHDOWN. EMERGENCY DECLARED NOT OVER WT. NLG SERVICING WITH THE AIRCRAFT ON THE GROUND (AMM TASK 12-12-09-600-801-A/300). SERVICED NLG STRUT IAW W/C 32-21-00-002. EXTENDED AND RETRACTED LANDING GEAR IAW ERJ AMM 32-33-00. OPS CHECK GOOD