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Runawy 34 was in use and the wind was from 340 degrees T, at 15-25 knots. VH-HYJ, an A320 aircraft, commenced the take off roll from the Juliet taxiway intersection. The aircraft was climbed on a track of 340 degrees M until about three miles from the airport, then was turned left onto a track of 230 degrees M. VH-TJH was also cleared for take off from the Juliet taxiway intersection. At the time of this clearance VH-HYJ had passed the threshold at the departure end of the runway. VH-TJH was also flown on a track of 340 degrees M on climb. At a height of about 1800 feet the aircraft encountered severe wake turbulence from VH-HYJ. To maintain control and prevent the aircraft from rolling excessively the captain was forced to apply and hold almost full left aileron followed by a significant amount of right aileron over a period of approximately 20 seconds. At the time of the incident VH-TJH was about five kilometres behind the other aircraft. The longitudinal separation between the two aircraft, at the time the take off in VH-TJH was commenced, met the minimum standard specified in the Manual of Air Traffic Services. Significant Factors The following factors were considered relevant to the development of the incident: 1 Encounter with wake turbulence.
Download Final Report
[ Download PDF: 14KB]
General details
Date: 19 January 1996 Investigation status: Completed 
Time: 9:18 ESuT  
 Investigation type: Occurrence Investigation 
 Occurrence type: Turbulence/windshear/microburst 
Release date: 09 May 1996 Occurrence class: Environment 
Report status: Final Occurrence category: Incident 
Aircraft details
Aircraft manufacturer: The Boeing Company 
Aircraft model: 737-476 
Aircraft registration: VH-TJH 
Sector: Jet 
Damage to aircraft: Nil 
Departure point:Melbourne Vic
Destination:Sydney NSW
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Last update 21 October 2014