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On 4 December 2013, at about 1440 Eastern Standard Time (EST), a PZL Bielsko 51 glider, registered VH-XOP (XOP), was winched at the Gympie aeroplane landing area (ALA). About 20 minutes later, the glider entered the circuit on downwind at about 900 ft above ground level (AGL), and the pilot broadcast a downwind call on the common traffic advisory frequency (CTAF).

At about the same time, a Bell 206 helicopter, registered VH‑WCS (WCS), was conducting circuits from runway 32. The instructor of WCS broadcast on the CTAF when turning base and subsequently heard the downwind call of XOP. At that time he sighted the glider on mid-downwind. Soon after, the pilot of XOP broadcast turning base. The glider pilot then commenced a diagonal base leg, on about a 45° angle from the downwind leg.

WCS turned onto final and the instructor broadcast a final call. The instructor reported that at this time, he assumed the glider was on late downwind or base leg. The pilot of XOP then reported broadcasting a final call, but neither pilot heard the other pilot’s finals broadcast.

About 90 seconds later, the instructor of WCS sighted the glider to his right, at about the same height and about 10 m away. The pilot of XOP also observed the helicopter to his left and slightly above. In response, he lowered the nose of the glider to increase the airspeed to stay below the helicopter. The glider then landed on the grass to the left of the runway.

The instructor of WCS took control of the helicopter from the student, conducted a clearing turn and subsequently landed on the sealed runway.

This incident highlights the importance of broadcasting radio calls to alert pilots and assist in see-and-avoid practices. It serves as a reminder to keep a good lookout for other aircraft, particularly around non-controlled aerodromes.

 

Aviation Short Investigation Bulletin - Issue 26

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General details
Date: 04 December 2013 Investigation status: Completed 
Time: 1500 EST Investigation type: Occurrence Investigation 
Location   (show map):Gympie (ALA), Queensland, 4 December 2013 Occurrence type:Near collision 
State: Queensland Occurrence class: Airspace 
Release date: 25 February 2014 Occurrence category: Serious Incident 
Report status: Final Highest injury level: None 
 
Aircraft 1 details
Aircraft manufacturer: Bell Helicopter Co 
Aircraft model: 206 
Aircraft registration: VH-WCS 
Serial number: 2931 
Type of operation: Flying Training 
Sector: Helicopter 
Damage to aircraft: Nil 
Destination:Gympie, Qld
Aircraft 2 details
Aircraft manufacturer: PZL - Bielsko 
Aircraft model: SZD-51 
Aircraft registration: VH-XOP 
Serial number: B-1822 
Type of operation: Gliding 
Sector: Sport and recreational 
Damage to aircraft: Nil 
Destination:Gympie, Qld
 
 
 
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Last update 06 June 2014