Investigation number
AO-2011-156
Occurrence date
Location
26 km south-east of Gunnedah
State
New South Wales
Report release date
Report status
Final
Investigation level
Short
Investigation type
Occurrence Investigation
Investigation status
Completed
Aviation occurrence category
Runway excursion
Occurrence class
Accident
Highest injury level
None

On 5 December 2011, at about 1030 EDT a Taylorcraft model BC12-D aircraft, registered VH-PEE, was engaged in taxi trails as part of a pre-flight inspection for a flight scheduled late in the day. The pilot reported that, while using a grass runway, 26 km to the south-east of Gunnedah Aerodrome, NSW the aircraft was struck by a strong wind gust or Willy-willy and, on attempting to correct with engine power and right rudder, the aircraft veered off of the runway. He was unable to regain control, and the aircraft subsequently struck a fence on the northern side of the runway and flipped over, coming to rest inverted. There were no injuries to the pilot. The aircraft incurred serious damage which included damage to the propeller, one wing strut and the wing surfaces.

Past studies have indicated that Willy-willies are unseen, unpredictable and can adversely affect light aircraft and helicopters when they are operating on or close to the ground. Pilots must be vigilant when operating in these areas and be prepared to react to mitigate the effects of Willy-willies and maintain control of the aircraft.

Aircraft Details
Manufacturer
Taylorcraft - Robert J Kuhlow
Model
BC12
Registration
VH-PEE
Serial number
8256
Operation type
Private
Sector
Piston
Destination
Gunnedah, NSW
Damage
Substantial