Following advice from air traffic control, the flight crew identified a problem with the on-board navigation systems.The crew then elected to discontinue the flight but were unable to return to Sydney as the weather had deteriorated in the Sydney area and the available systems limited the flight to approaches in visual conditions.The aircraft was instead radar vectored to Melbourne, Victoria and the flight completed in visual conditions.
The ATSB said “it found that when setting up the aircraft’s flight management and guidance system, the captain inadvertently entered the wrong longitudinal position of the aircraft. This adversely affected the on-board navigation systems however, despite a number of opportunities to identify and correct the error, it was not noticed until after the aircraft became airborne and started tracking in the wrong direction.”
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