Aviation safety investigations & reports

Near collision involving Glaser-Dirks DG-1000 glider, VH-NDQ, and Jabiru J170, 24-7750, Bathurst Airport, NSW on 13 April 2016

Investigation number:
AO-2016-034
Status: Completed
Investigation completed

Final Report

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On 13 April 2016, an instructor and student of a Jabiru J170-D aeroplane, registered 24-7750 (7750), conducted a local training flight from Bathurst Airport, New South Wales. At about 1446 Eastern Standard Time, the aircraft arrived in the circuit, and the instructor broadcast that they were joining the circuit on an early downwind for runway 17, for a full-stop landing.

Powered aircraft were operating on runway 17 and gliders (and towing aircraft) were operating on runway 08.

Meanwhile, a student pilot of a Glaser-Dirks DG-1000S glider, registered VH-NDQ (NDQ) was conducting a solo flight at Bathurst. At about 1449, about 90 seconds after the pilot of 7750 had communicated with Glider Ground regarding glider traffic in the air, the pilot of NDQ broadcast on the Bathurst CTAF that they were on left downwind for runway 08.

After 7750 touched down on runway 17, about 100 m before the intersection with runway 08, the pilot sighted a glider (NDQ) on short final for runway 08, at an estimated 100 ft above ground level. The pilot applied full power to cross runway 08 as quickly as possible.

As 7750 landed, the pilot of NDQ assessed that there was the potential for a collision, closed the glider’s airbrakes and initiated a climb to pass over 7750. The glider then landed ahead on runway 08.

The instructor in 7750 lost sight of NDQ as it passed overhead. As 7750 accelerated with a high power setting, the instructor elected to continue a take-off and conducted a circuit before landing safely.

This incident highlights the importance of effective communication. The primary purpose of communications on the CTAF is to ensure the maintenance of appropriate separation through mutual understanding by pilots of each other’s position and intentions. Where a pilot identifies a risk of collision, that pilot should alert others as soon as possible to allow a coordinated and effective response.

 

Aviation Short Investigations Bulletin - Issue 51

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General details
Date: 13 April 2016   Investigation status: Completed  
Time: 14:50 EST   Investigation phase:  
Location   (show map): Bathurst Airport   Investigation type: Occurrence Investigation  
State: New South Wales   Occurrence type: Near collision  
Release date: 08 September 2016   Occurrence class: Operational  
Report status: Final   Occurrence category: Serious Incident  
  Highest injury level: None  

Aircraft 1 details

Aircraft 1 details
Aircraft manufacturer Glaser-Dirks  
Aircraft model DG-1000S  
Aircraft registration VH-NDQ  
Serial number 10-223S142  
Type of operation Flying Training  
Sector Sport and recreational  
Damage to aircraft Nil  
Departure point Bathurst, NSW  
Destination Bathurst, NSW  

Aircraft 2 details

Aircraft 2 details
Aircraft manufacturer Jabiru Aircraft Pty Ltd  
Aircraft model J170-D  
Aircraft registration 24-7750  
Serial number 308  
Type of operation Flying Training  
Sector Piston  
Damage to aircraft Nil  
Destination Bathurst, NSW  
Last update 14 November 2018