On 29 July 2012, the rudder of a Pilatus PC6 detached in flight and fell onto the stabiliser/elevator preventing its normal movement. Pitch control was gained using the electric stabiliser trim and a successful touchdown was achieved on the second attempt. However, directional control could not be maintained and a lateral runway excursion followed. Investigation attributed the rudder failure to maintenance error which went undetected. Unapproved dispensation by the maintenance organisation involved, which allowed some dual inspections for correct completion of safety critical tasks to be carried out by the same person, was considered to be a significant contributory factor.