Thank you for the responses, I didn't realise the recorders were so close to the Vertical stabiliser, I suppose anything related to that damage could affect them in that case, leaking hydraulic fluid for example? Also I also dont know what will trip the G switch, its probably fairly high, but without a V-stab the aircraft were subject to large lateral G's, I suppose this also may have tripped them perhaps, I dont imagine the lateral G threshold is that high