What was found
THE CREW REPORTED THAT DURING TAKEOFF THEY FELT A VIBRATION FROM THE NOSE GEAR AND HEARD A THUMP AFTER ROTATION. THE TOWER CONFIRMED RUBBER ON THE RUNWAY. THE CREW DECLARED AN EMERGENCY AND COMPLIED WITH AOM VOL 1 PROCDURES AND LANDED WITHOUT INCIDENT. THE ACFT WAS REMOVED FROM SERVICE. NR 3, R & R RT AND LT NLG WHEEL ASSY AND PERFORMED TIRE TREAD FAILURE INSPECTION/CHECK IAW AMM 05-50-15. R & R ND REPLACED 7 DEGREE SWITCH IAW AMM 32-50-06. OPS CHECK NORMAL. PN 8-527-01, SN 8-527-01 & 80-057-01. R & R THE NLG RT STEERING ACTUATOR HYD LINE IAW CMM 32-21-10. THE ACFT WAS RETURNED TO SERVICE.