What was found
YIP - AIRPLANE HAS A RYTHMATIC VIBRATION AT ALL SPEEDS, BUT MORE PRONOUNCED AT LOW ALTITUDES. INSPECTED AND FOUND RIGHT MOVEABLE VANE CABLE FOUND TO BE BROKEN (CABLE RUN NR 169A, P/N 3922841-561). REMOVED AND REPLACED BROKEN CABLE. INSPECTED ASSOCIATED EQUIPMENT FOR DAMAGE AND CONDITION, RERIGGED CABLE SYSTEM. (M)