Aviation safety investigations & reports

Britaero 146 - 300, VH-EWS, Airbus A300 - B4-600, VH-YMK, Sydney NSW, 13 July 1991

Investigation number:
199100039
Status: Completed
Investigation completed

Summary

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VH-EWS was departing from runway 16 at Sydney for Hamilton Island, followed shortly after by VH-YMK for Perth. The DEPARTURE Radar Controllers on duty at the Sydney Area Approach Control Centre (AACC), believed that a breakdown in the radar separation standard had occurred between the two aircraft shortly after take-off. The initial DEPARTURE instructions given to the Sydney Control Tower for VH-YMK were 'Cancel SID turn right heading 170 maintain 3 000'. The DEPARTURE sequence was subsequently changed twice with two aircraft VH-HVA and VH-EWS sequenced ahead of VH-YMK. Immediately following the issue of the final DEPARTURE instruction for VH-EWS, the instruction 'and YMK can be unrestricted' was passed by DEPARTUREs to the Tower. The Tower understood the instruction to mean cancel the previous DEPARTURE instruction, and the aircraft may now track via the cleared SID with no altitude restriction. The

Download Final Report
[Download  PDF: 22KB]
 
 
 
General details
Date: 13 July 1991   Investigation status: Completed  
Time: 935    
Location   (show map): Sydney    
State: New South Wales    
Release date: 16 October 1991   Occurrence category: Incident  
Report status: Final   Highest injury level: None  

Aircraft 1 details

Aircraft 1 details
Aircraft manufacturer Airbus Industrie  
Aircraft model A300  
Aircraft registration VH-YMK  
Serial number E3197  
Type of operation Air Transport High Capacity  
Damage to aircraft Nil  
Departure point Sydney NSW  
Departure time N/A  
Destination Hamilton Island QLD  

Aircraft 2 details

Aircraft 2 details
Aircraft manufacturer Airbus Industrie  
Aircraft model A300  
Aircraft registration VH-YMK  
Serial number 556  
Type of operation Air Transport High Capacity  
Damage to aircraft Nil  
Departure point Sydney NSW  
Destination Perth WA  
Last update 13 May 2014