Aviation safety investigations & reports

Lockheed C141, M60193, Boeing B737, VH-CZC, 30 km N Sydney NSW, 19 July 1991

Investigation number:
199101903
Status: Completed
Investigation completed

Summary

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The Sydney Approach North controller was radar vectoring MAC 60193, a USAF military transport aircraft, to intercept the flight planned track to Christchurch after departing from RAAF Richmond. VH-CZC was being radar vectored by the Sydney DEPARTUREs North controller to intercept the 002 radial to West Maitland after taking off from runway 25. When it became apparent that the flight paths would conflict, the DEPARTUREs North controller was assigned the task of maintaining adequate separation between both aircraft. The minimum separation required was 1000 ft vertically, or 3 nautical miles laterally. A climb restriction was applied to VH-CZC, limiting that aircraft to an altitude of 6000 ft. This restriction was applied in anticipation of MAC 60193 reaching 7000 ft or higher before lateral spacing was less than 3 nautical miles. However, for a period of about 3 minutes, the C141 failed to climb as rapidly as the DEPARTUREs controller had anticipated and it became apparent a traffic confliction could not be averted. Both crews were notified of the conflicting traffic and given heading changes. Visual contact was established and the aircraft passed safely clear of each other at less than the minimum required separation standard.

Download Final Report
[Download  PDF: 23KB]
 
 
 
General details
Date: 19 July 1991   Investigation status: Completed  
Time: 854    
Location   (show map): 30 km N Sydney    
State: New South Wales    
Release date: 27 September 1991   Occurrence category: Incident  
Report status: Final   Highest injury level: None  

Aircraft 1 details

Aircraft 1 details
Aircraft manufacturer The Boeing Company  
Aircraft model 737  
Aircraft registration VH-CZC  
Serial number N/K  
Type of operation Air Transport High Capacity  
Damage to aircraft Nil  
Departure point Richmond NSW  
Departure time 0849  
Destination Christchurch NZ  

Aircraft 2 details

Aircraft 2 details
Aircraft manufacturer The Boeing Company  
Aircraft model 737  
Aircraft registration VH-CZC  
Serial number 23655  
Type of operation Air Transport High Capacity  
Damage to aircraft Nil  
Departure point Sydney NSW  
Departure time 851  
Destination Brisbane QLD  
Last update 13 May 2014