Boom 16 is mounted on {HEAD ~ a yoke 32 subassembly} that includes a pair of arms 34 with {TAIL ~ outwardly protruding pins} 36 
Boom 16 is mounted on { HEAD ~ a yoke 32 subassembly } that includes a pair of arms 34 with { TAIL ~ outwardly protruding pins } 36
OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH