Aviation safety investigations & reports

Loss of separation involving a Airbus A340, B-HXI and Mcdonnell Douglas Corp. F/A-18A, 139km N Sydney, NSW on 5 March 2001

Investigation number:
200100959
Status: Completed
Investigation completed

Summary

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The crew of the Airbus Industrie A340 responded to a traffic alert and collision avoidance system (TCAS) resolution advisory (RA) and climbed 600 ft above the cleared level of flight level (FL)190. The conflicting traffic was a formation of military McDonnell Douglas Corporation FA-18A Hornet aircraft in transit through a military airspace corridor. Traffic information was passed to the crew of the A340 by the air traffic controller. The Hornet crews were on military control frequencies. At the time of the TCAS alert, the Hornets had climbed to FL180 from FL170 to transit civil airspace via a military airspace corridor 75km north of Sydney, known as the Hunter Corridor. Civil radar data indicated that the Hornets climbed to FL183 and military radar data indicated a climb to FL182. The crews stated that they were positive that they had levelled at FL180, and that they had the A340 in sight. Analysis of the radar data indicated that, at the time of the resolution advisory, the standard vertical separation had reduced to less than 1000ft resulting in an infringement of separation standards.
Download Final Report
[Download  PDF: 13KB]
 
 
 
General details
Date: 05 March 2001   Investigation status: Completed  
Time: 11:16 ESuT    
State: New South Wales   Occurrence type: Loss of separation  
Release date: 25 September 2001   Occurrence class: Airspace  
Report status: Final   Occurrence category: Incident  

Aircraft 1 details

Aircraft 1 details
Aircraft manufacturer Airbus  
Aircraft model A340  
Aircraft registration B-HXI  
Sector Other  
Damage to aircraft Nil  
Departure point Hong Kong  
Destination Sydney NSW  

Aircraft 2 details

Aircraft 2 details
Aircraft manufacturer McDonnell Douglas Corp.  
Aircraft model F/A-18A  
Aircraft registration UNKNOWN  
Sector Other  
Damage to aircraft Nil  
Departure point Williamtown NSW  
Destination Williamtown NSW