Investigation number
AO-2011-158
Occurrence date
Location
Meekatharra Airport
State
Western Australia
Report release date
Report status
Final
Investigation level
Short
Investigation type
Occurrence Investigation
Investigation status
Completed
Aviation occurrence type
Collision with terrain
Occurrence category
Accident
Highest injury level
None

On 6 December 2011, a Rockwell International 114 (Commander), registered VH-SJF (SJF), made a planned refuelling stop at Meekatharra Aerodrome in Western Australia on a flight from Karratha to Perth. Immediately following the refuel, the pilot taxied for departure before an approaching storm cell arrived in the area.

Shortly after rotation at 0925 WST, the wind speed and direction changed suddenly, causing the aircraft to sink and drift off the runway. The pilot initially lowered the nose, but then raised the nose and applied power to clear a ditch and mound running parallel to the runway.

The pilot again lowered the nose, but as the aircraft was not developing sufficient lift to clear trees ahead, he cut the power and aimed for a gap in the trees. The left wing contacted a tree and spun the aircraft, causing serious damage. The pilot, who was the sole occupant, was uninjured.

Weather related issues accounted for 25% of local condition related safety factors identified in aviation investigations completed by the ATSB over the 2010-11 period.

An ATSB aviation research and analysis report published in 2010 found that private operations accounted for 44% of accidents in proportion to hours flown. Problems with a pilot's assessment and planning were evident in all of these accidents. The report recommended that private pilots make decisions pre-flight and that they set and stick to personnel minimums.

Wind direction and strength can change ahead of a storm cell. The Pilot's Handbook of Aeronautical Knowledge, published in 2008 by the Federal Aviation Authority (FAA), described the impact of windshear, specifically a microburst, on an aircraft taking off. The description in the Handbook matches the sudden change in wind and aircraft performance characteristics reported by the pilot.

Aircraft Details
Manufacturer
Rockwell International
Model
114
Registration
VH-SJF
Serial number
14403
Operation type
Business
Sector
Piston
Departure point
Meekatharra, WA
Destination
Jandakot, WA
Damage
Substantial