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Both aircraft were inbound to Sydney on different but converging routes, cruising at the same level. The Sydney Flow Controller requested that VH-TJL be positioned 15NM behind VH-TJD to facilitate their arrival. The controller responsible for the aircraft instructed VH-TJD to turn right (to place it on the same track as VH-TJL) and to descend. As VH-TJD converged on the track flown by VH-TJL the required lateral separation of 5NM was lost before the required vertical separation was achieved.
 
General details
Date: 06 November 1993 Investigation status: Completed 
Time: 13:18 ESuT Investigation type: Occurrence Investigation 
 Occurrence type:Loss of separation 
 Occurrence class: Airspace 
Release date: 19 June 1994 Occurrence category: Incident 
Report status: Final  
 
Aircraft 1 details
Aircraft manufacturer: The Boeing Company 
Aircraft model: 737-376 
Aircraft registration: VH-TJD 
Sector: Jet 
Damage to aircraft: Nil 
Departure point:Adelaide SA
Destination:Sydney NSW
Aircraft 2 details
Aircraft manufacturer: The Boeing Company 
Aircraft model: 737-476 
Aircraft registration: VH-TJL 
Sector: Jet 
Damage to aircraft: Nil 
Departure point:Perth WA
Destination:Sydney NSW
 
 
 
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Last update 24 July 2015