Airframe event involving a de Havilland Canada DHC-8-102, VH-TQP, Sydney, NSW on 19 October 1993

On arrival at Dubbo, the landing gear failed to extend when the normal down selection was made. The crew completed the checklist requirements and after consultation with their company, elected to return to Sydney. A Pan call was made to ATC as the aircraft approached Sydney. The landing gear was successfully extended via the alternate selection procedure and the aircraft arrived without further incident. Subsequent tests of the landing gear retract and extension system revealed an intermittent fault in a control relay.