What was found
GEAR DISAGREE ON DEPARTURE FROM ATL. AFTER THE LG WAS SELECTED IN THE UP THE FOLLOW MESSAGES APPEARED WITHIN 10 SECONDS, GEAR DISAGREE WARNING NLG DOOR OPEN WARNING NWS INOPERATIVE, CAUTION WOW, INPUT CAUTION WOW, OUTPUT STATUS. SERVICED NOSE GEAR IAW AMM 12-12-32. UPON JACK UP THE NOSE WE FOUND THE NOSE GEAR WOULD NOT CTR & RETAINING COLLAR LOOSE. WITH WEIGHT OFF WHEELS IF YOU TRY TO TURN THE NOSE WHEEL BY HAND RETAINING COLLAR WOULD TURN WITH IT. R & R PISTON & AXLE QUICK CHANGE KIT IAW AMM 32-21-30, LEAK & OPERATIONS CHECKED GOOD.