Aviation safety investigations & reports

Weather related event - VH-NGX, Southern Cross (ALA), WA, 1 June 2010

Investigation number:
AO-2010-039
Status: Completed
Investigation completed

Summary

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On 1 June 2010, a Fairchild Industries Inc. SA226-TC (Metro II) aircraft, registered VH-NGX, was being prepared for a charter passenger service from Perth to the Southern Cross aeroplane landing area (ALA), Western Australia (WA).

Prior to departing, the crew obtained the weather forecasts for the flight. The area forecast (ARFOR), which covered a large area, forecast fog, while the aerodrome forecast (TAF), which covered a particular location, forecast conditions as clear. The crew contacted the Bureau of Meteorology (BoM) to confirm the conditions. The crew received an amended forecast for Southern Cross indicating fog, and visibility reducing to 300 m until 0800 Western Standard Time; after this time conditions were forecast to improve.

Due to the payload requirements of the flight, additional fuel for an alternate aerodrome could not be carried as required if the weather conditions at Southern Cross were unfavourable. Consequently, the crew elected to delay the departure from Perth until 0800.

While en route, the crew observed a band of cloud between Perth and Southern Cross. On arrival at Southern Cross, the conditions were not as expected by the crew, with overcast low cloud and fog present. The crew tracked to the north of the airstrip, where the fog had cleared, and commenced the approach. In order to remain clear of cloud and maintain visual sight with the runway, the aircraft was descended to 337 ft above ground level (AGL). From this point, the crew determined that a straight-in-approach could not be conducted and a low level circling approach to position the aircraft on final for runway 14 was performed. The aircraft landed at about 0915 without further incident.

The BoM conducted a review of this incident and made a number of recommendations, including making forecasters aware of the synoptic conditions behind this incident and its consequential effect on users; and as part of a national review, establishing the minimum observation requirements needed in order to issue and maintain a weather watch on a TAF.

Download Final Report
[Download  PDF: 2.47MB]
 
 
 
General details
Date: 01 June 2010   Investigation status: Completed  
Time: 0900 WST    
Location   (show map): Southern Cross (ALA)   Investigation type: Occurrence Investigation  
State: Western Australia   Occurrence type: Weather - Other  
Release date: 14 October 2010   Occurrence class: Environment  
Report status: Final   Occurrence category: Serious Incident  
  Highest injury level: None  

Aircraft details

Aircraft details
Aircraft manufacturer Fairchild Industries Inc  
Aircraft model SA226  
Aircraft registration VH-NGX  
Serial number TC-287  
Type of operation Charter  
Damage to aircraft Nil  
Departure point Perth, WA  
Destination Southern Cross, WA  
Last update 14 November 2018