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Last updated: 25 September 2021
Statuts:Enquête Officielle
Date:lundi 22 mai 1989
Type/Sous-type:Silhouette image of generic BN2P model; specific model in this crash may look slightly different
PADC/Pilatus Britten-Norman BN-2A-26 Islander
Compagnie:Cockatoo Island Airways
Immatriculation: VH-BSN
Numéro de série: 3005
Année de Fabrication: 1981-07-15 (7 years 10 months)
Equipage:victimes: 0 / à bord: 1
Passagers:victimes: 0 / à bord: 2
Total:victimes: 0 / à bord: 3
Dégats de l'appareil: Perte Totale
Conséquences: Written off (damaged beyond repair)
Lieu de l'accident:56 km (35 milles) NW de Derby, WA (   Australie)
Phase de vol: En vol (ENR)
Nature:Charter National
Aéroport de départ:Cockatoo Island Airport, WA (YCTI), Australie
Aéroport de destination:Derby Airport, WA (DRB/YDBY), Australie
The pilot of a chartered BN-2A-26 Islander had planned the direct track for the flight from Cockatoo Island to Derby, Australia at 5500 feet above sea level.
When the pilot gave his departure call he amended his cruising level to below 5000 feet. No further calls were received from the aircraft. The Cockatoo Island work boat was 56 kilometres north-north-west of Derby, and approximately 20 kilometres west of the direct track between Cockatoo Island and Derby. The crew of the boat observed an aircraft approaching at very low level. The aircraft passed over the boat approximately 5-7 metres above the deck, and entered a right hand turn. During the turn the right wing tip struck the water causing the aircraft to cartwheel and crash about 400 metres from the boat. The fuselage broke open on impact and the occupants were subsequently rescued by the crew of the boat. The pilot declined to provide any information which might have clarified the circumstances of the accident, however, available information indicates that he carried out an unauthorized low pass over the boat. During the turn following the low pass, he misjudged the aircraft's height and the right wing tip struck the water.

Probable Cause:

Significant Factors:
1. The pilot was neither trained nor authorized to conduct operations at low level.
2. The pilot exercised poor judgement by operating at an unnecessarily low height.
3. The pilot misjudged his height above the water.

Accident investigation:
Investigating agency: BASI
Status: Investigation completed
Duration: 11 months
Accident number: 198900237
Download report: Summary report


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Ce plan montre l'aéroport de départ ainsi que la supposée destination du vol. La ligne fixe reliant les deux aéroports n'est pas le plan de vol exact.
La distance entre Cockatoo Island Airport, WA et Derby Airport, WA est de 143 km (89 miles).
Accident location: Global; accuracy within tens or hundreds of kilometers.

Les informations ci-dessus ne représentent pas l'opinion de la 'Flight Safety Foundation' ou de 'Aviation Safety Network' sur les causes de l'accident. Ces informations prélimimaires sont basées sur les faits tel qu'ils sont connus à ce jour.
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