After an investigation Criminal_investigation , the cause Causation of the accident Catastrophe was determined Deciding to be `` hydroplaning of the landing gear wheels , which precluded Hindering braking effectiveness . ''

The cables attaching Connect the pilots ' control wheels to the aileron boost unit had been removed Removing two months before the accident during routine maintenance ; a safety cable that held part of the assembly together had not been replaced Change when the cables were hooked Connect back up .

This caused Causation the nose wheels to dig in and the aircraft to overturn Self_motion , losing Earnings_and_losses both wings and the starboard tailplane in the process .

The leading bogie of the locomotive derailed Motion_directional on hitting the trolley , but the driving wheels did not ; the engine continued onwards until it hit a diamond crossover at the north end of the station when it became completely derailed , detached from its tender and ended up facing backwards .