Aviation safety investigations & reports

Near collision involving a Diamond DA20, VH-YNB and a Mooney M20, VH-SJT, near Jandakot Airport, WA on 20 February 2015

Investigation number:
AO-2015-022
Status: Completed
Investigation completed

Summary

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On 20 February 2015, at about 1130 Western Standard Time, a Diamond DA20 aircraft, registered VH-YNB (YNB), taxied at Jandakot Airport, Western Australia, for a flight to the training area south of the airport, with a trainee instructor and a flight instructor on board. At about the same time, the pilot of a Mooney M20 aircraft, registered VH-SJT (SJT), taxied for a private flight to Busselton Airport with three passengers on board. The pilot of SJT elected to leave the door open to improve comfort in the aircraft as it was a warm day, and planned to have the passenger close the door prior to take-off.

At about 1136, the aerodrome controller cleared YNB for take-off from runway 24 Right (24R). The controller cleared SJT for take-off about 23 seconds later, and did not advise of any traffic. The pilot of SJT then commenced the take-off run and directed the front seat passenger to close the door. The front seat passenger was unable to fully close the door, resulting in air flowing in on the passengers seated in the back seat and articles being blown around inside the cabin. The pilot continued with the take-off and asked the passengers to stay calm and silent, and the door was left partially open. Both aircraft departed Jandakot via Yangebup Lake at about 1,000 ft.

After passing Yangebup Lake, the pilot of SJT established the aircraft in a climb to 1,500 ft. When overhead Lake Thomson, the trainee instructor of YNB conducted a climb to 1,500 ft then lowered the aircraft nose and levelled off to check the area ahead was clear of traffic.

The instructor then observed SJT pass diagonally from behind and left to right about 20 ft above YNB.
This incident highlights the importance of being aware of other aircraft operating in the area, particularly around airport departure points. When departing into Class G airspace it is important for pilots to continue their awareness of other aircraft and to keep a good lookout at all times.

Aviation Short Investigations Bulletin - Issue 41

 

Download Final report
[Download  PDF: 189KB]
 
 
Alternate: [Download  DOCX: 865KB]
 

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General details
Date: 20 February 2015   Investigation status: Completed  
Time: 1150 WST   Investigation level: Short - click for an explanation of investigation levels  
Location   (show map): near Jandakot Airport    
State: Western Australia   Occurrence type: Near collision  
Release date: 10 June 2015   Occurrence category: Serious Incident  
Report status: Final   Highest injury level: None  

Aircraft 1 details

Aircraft 1 details
Aircraft manufacturer Diamond Aircraft Industries  
Aircraft model DA-20-C1  
Aircraft registration VH-YNB  
Serial number C0308  
Type of operation Flying Training  
Sector Piston  
Damage to aircraft Nil  
Departure point Jandakot, WA  
Destination Jandakot, WA  

Aircraft 2 details

Aircraft 2 details
Aircraft manufacturer Mooney Aircraft Corp  
Aircraft model M20J  
Aircraft registration VH-SJT  
Serial number 24-1537  
Type of operation Private  
Sector Piston  
Damage to aircraft Nil  
Departure point Jandakot, WA  
Destination Busselton, WA  
Last update 14 November 2018