If it was just rudder trim, why did the report take nearly 2 years?
From my initial scan of the report:
As i understand it, the PIC was the last person to fly the aircraft. So, who moved the trim?
The report infers that the pilot did not undertake a proper pre-flight, but despite CCTV footage is unable to provide any factual evidence - only speculation.
It notes that the preflight checks have 5 separate checks of the rudder trim, but has nothing other than speculation that says these were not conducted.
Examination of the wreckage clearly shows full LH rudder trim, but the report is mute on when or how it got that way.