Capn Grog - the loss of a TR blade or the loss of TR drive or the complete TR would have been immediately obvious to the investigation team.
You're absolutely right! I somehow skimmed over this sentence under the "Aircraft Information" section of the report: "Wreckage examination did not identify any pre-existing system malfunctions that would have played a role in the loss of control in this occurrence." My only defense is that perhaps I've become too used to FAA/NTSB reports wherein they routinely state words to the effect: "Control continuity was established from the (elevator, aileron, swashplate etc.)". Well, that's my excuse and I'm stickin' to it ... for now.
Cheers,
Grog