I'm a little late to this thread but......
back in the 1990's I worked for a company that was involved in the FADEC software for the Chinook in question. I was told that immeditaley prior to the crash, the demand had been given to both engines for maximum power (and lift too?) but they had not responded to the pilot's request. The internals of both control boxes were recovered but due to the heat they experienced in the post-crash fire, it was not possible to determine if they had wiring/solder faults, correct versions of firmware etc. All that is clear is that the instructions given by the pilots did NOT get translated into commands to the engines. To blame the pilots for this crash is therefore WRONG 100%.
However, we're talking abut the MoD here........