500 • Boom Components Figure 503.1 Rev C September 2006 Description Secondary Boom Tube 2 2 3 11 5 20 1 14 3 19 2 10 8 21 18 3 5 4 23 22 6 8 17 7 9 5 10 5 11 5 12 3 13 14 15 16 Z-135/70 Part No. 106877