What was found
AT ROTATION, CREW NOTICED SEVERE VIBRATION FROM MLG AREA. A/C CONTINUED ONTO MSP, CREW FLEW BY TOWER, UNABLE TO DETERMINE IF TIRE DAMAGE HAD OCCURRED. EMERGENCY LANDING DECLARED. MX INSPECTED TIRES, BRAKES & GEAR, NO DEFECTS NOTED. PERFORMED BSCU BITE TEST, NO FAULTS FOUND. MOC GENERATED FOLLOW UP TO BE PREFORMED IN PHX. MX INSPECTED, FOUND APEX PIN WORN ON UPPER TORQUE LINK AT RT MLG UPPER TORQUE LINK. REPLACED APEX PIN & TORQUE LINK. VIBRATION WRITTEN UP AGAIN RESULTING IN NOSE TIRES & MLG TIRES BEING REPLACED. TORQUE LING APEX PIN WAS SCRAPPED. UPPER TORQUE LING ASSEMBLY WAS REPAIRED, TWO WORN APEX BUSHINGS WERE REPLACED WITH NEW BUSHINGS. WORK WAS ACCOMPLISHED IAW CMM 32-11-33 REV. 29.