There was no rupture Destroying of any hydraulic system , so the pilots still had control Control of the ailerons , the right elevator , and the horizontal stabilizer .

Because the right elevator cable was partially restricted Hindering , however , both pilots had to apply Using back pressure Causation on the yoke for the landing Arriving flare .

The ECAA concluded Coming_to_believe that the incident Catastrophe was caused Causation by mechanical failure of the aircraft 's elevator control Control system .

The ECAA 's report Reporting suggested Statement several control Control failure scenarios as possible causes Causation of the crash Catastrophe , focusing Aiming on a possible failure of one of the right elevator 's power control Control units .

Investigators also found Know evidence Statement that the takeoff may have been performed Hold with the elevator trim tab still set Being_in_operation for landing .

If the elevator trim tab had not been set Being_in_operation for takeoff this would have been exacerbated Cause_change_of_position_on_a_scale by the incorrect position of the centre of gravity and the aircraft would have been uncontrollable .

The inquest found Know that the accident was due Causation to metal fatigue of two bolts in the elevator system .