Originally Posted by
helispotter
Or could that likewise have been ejected once the fuselage started to spin on loss of the tailboom?
Probably this scenario as they did not locate the bolt, nut, or washers. The docket gives more details and pics. Given the airframe tailboom ring is pulled forward and the upper L/H hardware missing, my guess would be that after the upper bolt failed in tension the remaining bolt shank captured the ring as the boom fell away. The fact they found exhaust traces between the faying surfaces of both mount rings at the upper L/H bolt hole would indicate to me it had been "loose" for a period time. The docket also mentioned the upper and lower R/H nuts were over torqued and the lower L/H nut under-torqued.