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On 1 February 2015, the pilot of a Robinson R44 helicopter, registered VH-YYF, prepared for a local flight at Warwombie Station, near Hughenden, Queensland. The pilot did not observe any abnormalities during the pre-flight inspection, with oil quantity within the normal range, about 80 L of fuel on board, and no water or other contaminants found during a fuel drain and check. The helicopter was loaded within the normal operating weight and balance limitations. The temperature was 20 °C, the sky clear of cloud and the wind was calm.

At about 0800 Eastern Standard Time, the helicopter lifted off normally. At about 20 ft above ground level, the pilot lowered the nose of the helicopter in attempt to gain forward speed and transition from hover to forward flight. The helicopter then sank quickly and the rotor rpm decayed. The pilot pulled back on the cyclic control in an attempt to flare and reduce the rate of descent, prior to contacting the ground. The left skid contacted the ground first and then the helicopter spun to the right. The rear of the right skid dug into the ground and the helicopter rolled onto the right side. The pilot selected the master switch off before exiting the helicopter uninjured. The helicopter sustained substantial damage.

The Robinson Helicopter Company Safety Notice SN-24, stated that rotor stall due to low RPM causes a very high percentage of helicopter accidents. These mostly occur close to the ground during take-off and landing. Safety Notice SN-10 reminds pilots to have their ‘reflexes conditioned so they will instantly add throttle and lower collective to maintain RPM in any emergency’.

Aviation Short Investigations Bulletin - Issue 40


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General details
Date: 01 February 2015 Investigation status: Completed 
Time: 0800 EST  
Location   (show map):near Hughenden Aerodrome (Warwombie Station) Investigation type: Occurrence Investigation 
State: Queensland Occurrence type: Collision with terrain 
Release date: 22 April 2015 Occurrence class: Operational 
Report status: Final Occurrence category: Accident 
 Highest injury level: None 
Aircraft details
Aircraft manufacturer: Robinson Helicopter Co 
Aircraft model: Robinson Helicopter Company R44 
Aircraft registration: VH-YYF 
Serial number: 2090 
Type of operation: General Aviation-Unknown 
Sector: Helicopter 
Damage to aircraft: Substantial 
Departure point:Hughenden, Qld
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Last update 14 November 2018