Budgevheli,
I am not sure what you mean by ”was the teeter shaft seized?” I can tell you that the shims had not been fitted. The engineer who disassembled the head was not responsible for the maintenance of the aircraft and had been asked by the A.A.I.B. to investigate. He therefore has no idea why the shims were not present. The head appeared to be perpendicular to the main rotor shaft. I hope this answers your questions. If you have a look at Dave Jackson’s post above the extract from the R22 maintenance manual gives details on how the rotor head should be assembled.