TOFO
Better still you can state that in YOUR OPINION airworthiness might have been a contributory factor in an accident that's cause will never be completely known or understood.
Again, if I may, it is a simple fact that if the airworthiness regulations had been implemented, the Mk2 would not have been flying that day. The aircrew would have had a Mk1, which they had requested anyway and were conversant with.
I am not saying the accident was caused by lack of airworthiness. But the fact remains that the aircraft had no clearance whatsoever to use ANY Nav or Comms systems, a fact confirmed by Lord Philip and accepted by MoD. What neither reported was the FACT that this information was withheld from aircrew by ACAS (Bagnall) in the Release to Service he signed in November 1993, which MoD later denied the existence of during the Philip Inquiry. Clearly, had the aircrew had this information, their request for a Mk1 would have carried more weight (at least I hope it would).