Aviation safety investigations & reports

Aircraft proximity - Cessna 172, VH-CNW and Piper Aircraft PA-28R-201, VH-AIZ, Ballarat Vic., 4 December 2010

Investigation number:
Status: Completed
Investigation completed


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On 4 December 2010, a Cessna Aircraft Company 172S aircraft, registered VH-CNW (CNW) and a Piper Aircraft Corp PA-28R-201 aircraft registered VH-AIZ (AIZ), were conducting concurrent training flights at Ballarat Airport, Victoria. A flight instructor and student were on board CNW and had entered the circuit with the intention of conducting a touch-and-go. AIZ was preparing to commence a flying training exercise from Ballarat Airport to the local training area with an instructor and student pilot on board.

CNW joined downwind for runway 05 due to glider activity on runway 36. While, AIZ lined up on runway 36 due to the more favourable wind direction.

Following a touch-and-go landing on runway 05, CNW was between 70 and 150 ft above the ground, when the instructor saw an aircraft airborne off runway 36 passing from right to left in front of them, in close proximity. The instructor of AIZ became aware of CNW at about the same time and both instructors took control of their aircraft and carried out evasive action.

One instructor estimated they were within 15-30 m of each other horizontally, at about the same height.

While both aircraft made radio broadcasts, it could not be determined why they could hear other radio traffic in the area, but not each other.

The aircraft operator of AIZ has planned the following safety action in response to this incident:

  • Institute a training procedure for trainee pilots to positively identify the location of any aircraft making a radio broadcast on the common traffic advisory frequency (CTAF) at Ballarat Airport.
  • Conduct a workshop for all staff and trainees on situational awareness.

The aircraft operator of CNW has alerted their staff and students to be extra vigilant when operating in and around Ballarat Airport and have limited student pilots from entering the circuit at Ballarat.

Download Final Report
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Alternate: [Download  DOC: 5.49MB]
General details
Date: 04 December 2010   Investigation status: Completed  
Time: 1200 EDT   Investigation level: Short - click for an explanation of investigation levels  
Location   (show map): Ballarat Aerodrome    
State: Victoria   Occurrence type: Near collision  
Release date: 16 May 2011   Occurrence category: Serious Incident  
Report status: Final   Highest injury level: None  

Aircraft 1 details

Aircraft 1 details
Aircraft manufacturer Cessna Aircraft Company  
Aircraft model 172  
Aircraft registration VH-CNW  
Serial number 172S10386  
Type of operation Flying Training  
Damage to aircraft Nil  
Departure point Ballarat Vic.  
Departure time 1200 ESuT  
Destination Point Cook Vic.  

Aircraft 2 details

Aircraft 2 details
Aircraft manufacturer Piper Aircraft Corp  
Aircraft model PA-28  
Aircraft registration VH-AIZ  
Serial number 28R-7837104  
Type of operation Flying Training  
Damage to aircraft Nil  
Last update 14 November 2018