What was found
GEAR DISAGREE UP & NOSE DOOR WARNINGS AFTER TAKEOFF. NOSE GEAR DOWN, MAIN GEARS UP TIME INTERVAL 6 SEC. GEAR LEVER WAS NOT MOVED WITHIN 30 SECONDS OF THE ORIGINAL SELECTION, MANUAL OPERATING SYS WAS NOT MOVED. LANDED AT 47,000 & MINIMAL DESCENT RATE. R & R NLG SLIDING PISTON & AXLE ASSEMBLY IAW AMM 32-21-30, DUE TO DAMAGE TO PISTON. PERFORMED EXTENSION & RETRACTION CHECK IAW AMM 32-30-00. GEAR SWINGS SATISFACTORY REFERENCE NRWC N62201 FOR MAINTENANCE DETAILS.