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Singapore Airlines Flight 288 [SIA288] was maintaining Flight Level [FL] 310 on a flight from Auckland to Singapore. It had been cleared to transit Restricted Area R588 at FL 310 by Sydney Sector 5 who had correctly co-ordinated the clearance with Williamtown Approach control. Four RAAF FA18A aircraft, operating as Shogun Section, had completed an exercise to the south of R588 and requested a clearance from Williamtown Approach control to return to Williamtown for a landing. The controller cleared Shogun Section to transit R588 at FL 310 from south to north on a course that was in conflict with SIA288. As the aircraft approached each other, Williamtown Approach noticed the confliction and passed traffic information to Shogun Section, who then initiated evasive action by climbing above the level of SIA288. The crew of SIA288 was not given traffic information by Sydney control but saw two FA18A aircraft and assessed that their own aircraft would pass behind. They therefore elected not to take any other action. The aircraft passed within 2.7 NM of each other with 900 ft vertical difference. The required separation standard is 5 NM or 2,000 ft and, as such, a breakdown in separation occurred. Significant Factors 1. The RAAF controller issued clearances for SIA288 and Shogun Section without correct application of the appropriate separation standards.
Download Final Report
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General details
Date: 15 March 1993 Investigation status: Completed 
Time: 15:19 EST Investigation type: Occurrence Investigation 
 Occurrence type:Loss of separation 
 Occurrence class: Airspace 
Release date: 26 July 1993 Occurrence category: Incident 
Report status: Final  
 
Aircraft 1 details
Aircraft manufacturer: McDonnell Douglas Corp. 
Aircraft model: F/A-18A 
Aircraft registration: UNKNOWN 
Sector: Jet 
Damage to aircraft: Nil 
Departure point:Williamtown NSW
Destination:Williamtown NSW
Aircraft 2 details
Aircraft manufacturer: The Boeing Company 
Aircraft model: 747 
Aircraft registration: UNKNOWN 
Sector: Jet 
Damage to aircraft: Nil 
Departure point:Auckland NZ
Destination:Singapore
 
 
 
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Last update 23 July 2015