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Last updated: 18 September 2021
Statuts:Enquête Officielle
Date:lundi 5 décembre 1983
Heure:06:42
Type/Sous-type:Silhouette image of generic C501 model; specific model in this crash may look slightly different
Cessna 501 Citation I/SP
Compagnie:North Broken Hill (Pty) Ltd
Immatriculation: VH-BNK
Numéro de série: 501-0171
Année de Fabrication: 1981
Equipage:victimes: 0 / à bord: 1
Passagers:victimes: 0 / à bord: 5
Total:victimes: 0 / à bord: 6
Dégats de l'appareil: Substantiels
Conséquences: Repaired
Lieu de l'accident:10 Km NE of Kalgoorlie, WA (   Australie)
Phase de vol: En vol (ENR)
Nature:Affaires
Aéroport de départ:Adelaide Airport, SA (ADL/YPAD), Australie
Aéroport de destination:Kalgoorlie Airport, WA (KGI/YPKG), Australie
Détails:
The pilot returned to Melbourne-Essendon Airport, Australia, at about 1700 hrs local time on 4 December 1983 after having operated for some time in Tasmania. On his arrival he refuelled the aircraft and completed a flight plan for the flight to Adelaide and Kalgoorlie the following morning.
At about 04:30 hours the next morning the pilot submitted the flight plan to Melbourne Briefing Office prior to obtaining a forecast of the upper winds for the route and terminal area forecasts for Adelaide and Kalgoorlie. To calculate the time intervals for the two legs of the proposed flight the pilot had assumed a headwind component of 50 knots. However, the forecast given to the pilot indicated that the headwind component for the Essendon to Adelaide leg at the planned level, flight level 310, was about 90 knots, and for the Adelaide to Kalgoorlie leg at planned level, flight level 370, was about 100 knots. The flight plan also gave the fuel endurance of the aircraft as 200 minutes ex Essendon and 300 minutes ex Adelaide. The aircraft subsequently departed Essendon and arrived in Adelaide after an apparently uneventful flight. The pilot left a note to instruct the aircraft refuellers to refuel the aircraft to full tanks and proceeded to the Adelaide Briefing Office. At the Briefing Office the pilot obtained updated weather forecasts which indicated that Kalgoorlie required an alternate. The pilot then advised the Briefing Officer that he would nominate Perth as the alternate. When he was then told that the fuel endurance necessary to plan Perth as an alternate would be 302 minutes, the pilot changed the flight plan to indicate that the fuel endurance of the aircraft ex Adelaide was 320 minutes. At the flight levels planned a fuel endurance of 320 minutes could not be obtained. The pilot also decided to fly the leg at flight level 290 as the head winds at that level were less than at the higher level, although still almost twice the strength of the flight planned headwind. When the pilot returned to the aircraft he found that it had not been refuelled as requested. He then assisted the refuellers to refuel the aircraft by adding the anti-icing agent to the fuel during the operation. Because of the delay the normal fuelling procedure was not carried out and as a result the fuel tanks were not filled to capacity. About an hour after departing Adelaide the aircraft entered cloud and encountered icing conditions. The pilot switched on the engine anti-ice and the cruise was continued at flight level 290 for about 30 minutes before climbing to flight level 310, clear of cloud where anti-icing was turned off. Operating with engine anti-ice on increases the fuel consumption by 8 percent. As the aircraft approached the mid-point of the flight the pilot became concerned that he may not have sufficient fuel to continue the flight from Kalgoorlie to the alternate, Perth. He decided to continue the flight towards Kalgoorlie and if the alternate requirement was not lifted when he was at a point along track that was 30 minutes beyond Caiguna, he would return to and land at Caiguna. Shortly afterwards the alternate requirement was lifted on Kalgoorlie. When 185 kilometres east of Kalgoorlie the pilot commenced the descent and at flight level 250 the aircraft entered cloud and the engine anti-ice was again switched on. During the descent the fuel low level warning light illuminated and the left engine surged and flamed out at 10,000 feet. The pilot unsuccessfully attempted to restart the engine. As the aircraft broke clear of cloud at 1000 feet above ground level the right engine also flamed out. The pilot made a distress call and landed the aircraft, gear up, on a fire break. After touchdown the aircraft skidded 400 metres before coming to rest. The examination of the aircraft found that during the landing the left fuel tank had been breached, however no evidence was found of any significant fuel spillage. Approximately five litres of fuel was recovered from each of the left and right fuel tanks. The engine fuel filters and fuel lines provided only a small amount of residual fuel. The inspection of the remainder of the aircraft did not reveal any defects that could have contributed to the accident.

Probable Cause:

Significant Factors:
1. The flight was inadequately planned; the aircraft had insufficient fuel capacity to complete the flight at the planned levels.
2. The refuelling of the aircraft at Adelaide was rushed and as a result the tanks were not filled.
3. During the flight insufficient attention was given to fuel management.
4. The engines flamed out due to fuel exhaustion.

Accident investigation:
cover
Investigating agency: BASI
Status: Investigation completed
Duration: 1 year and 7 months
Accident number: 198304358
Download report: Final report


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Plan
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 Adelaide Airport, SA et Kalgoorlie Airport, WA est de 1653 km (1033 miles).

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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