Folks,
Perhaps because the analysis of the FDR, and the actual activation time base showed that the lights were on at the start of the takeoff roll, and the demonstrated probability was that they went off shortly after airborne.
Or perhaps not. The evidence was LOST due to the passage of time.
What about this one?
https://www.atsb.gov.au/media/412877...-171_final.pdf
Here is some of the case info, I should have said Launceston but as there have been so many I confused them.
http://www.summarycrime.com/2009/05/losing-evidence-might-mean-losing-case.html