What was found
AFTER GEAR RETRACTION THERE IS A VERY SIGNIFICANT VIBRATION THAT LASTS FOR ABOUT 2 MINUTES, COMING FROM THE NOSE GEAR. T/S WHEEL ASSEMBLY BY REMOVING & BALANCING, FOUND TIMES TO BE OUT OF ROUND FACILITATING REPLACEMENT, RECEIVED OVH WHEEL ASSEMBLIES FROM NETJETS, CHECKED BALANCE OF OVH WHEEL ASSY CHECK GOOD. INSTALLED ASSEM ON NOSE STRUT, TIRES INFLATED TO 100 PSI IAW 800XP CMM 32-44-49 / AMM 32-40-00 / AMM 12-00-00.