sevenstrokeroll;
the flight data recorder would be affected by the ground shift mechanism.
I think most DFDR's start with the anti-collision light being turned on and continue until it's shut off - I believe that's the way it worked with our '9's and '8's but that's going back about 30 - 35 years.
I think earlier in the thread it was mentioned that apparently there was some damage to the DFDR. - possibly heat damage.