Flipster,
I think your 6849 post is the best I have read on this subject.
Robin,
Thank you for clarifying many points that were beyond my simple old aircrew brain.
If the last 50 to 100 keystrokes could be extracted, it would be possible to establish exactly where, when and how the crew changed Waypoints. There are a couple of problems with this.
1. By RACALS own admission this equipment was not designed to retrieve Historic Data. In any reasonable Court or Tribunal, this is inadmissable evidence.
2. This Data was not pubished, so has any expert from the Mull Group ever been able to examine this evidence?
3. When was the display switched off? Why was this very important event never nentioned in the Analysis?
You say that the 151 G/S was not the instantaneous value, but the system average of the final 2 minutes of flight. It makes sense.
Mr Cable gives the G/S at impact of 174.
If both RACAL and Cable are correct then there was a fairly dramatic acceleration in the final phase of the flight.
Since no sane aircrew accelerate into deteriorating weather conditions, the only conclusion is engine runaway??