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At about 1500 Eastern Standard Time on 6 April 2017, a Robinson Helicopter R44 II, registered VH‑MQE, departed from Melanie Camp landing area, Queensland. The pilot and three passengers were on board the scenic charter flight.

After about half an hour into the scenic flight, the pilot commenced a large orbit around a lake that was located about 15 km NE of Melanie Camp. They turned downwind at about 550 ft above ground level, with an airspeed of about 65 knots and the main rotor RPM was about 101 per cent. About 15 seconds later, the main rotor low RPM horn sounded through the pilots headset. The pilot observed the main rotor low RPM warning light illuminated and a rapid decrease in main rotor speed. The pilot advanced the engine throttle and lowered the collective but felt that this made little difference with no increase in main rotor speed even though full engine power was applied. Shortly afterwards, the pilot initiated an autorotation and prepared to land on a beach.

As the helicopter approached the landing spot, the pilot arrested the helicopter’s rate of descent and the skids contacted the sand in a run on landing. After about 3 m the left skid dug into soft sand, which resulted in a dynamic roll over. The helicopter came to rest on the left side. The pilot and three passengers exited the helicopter through the right forward and aft exits. There were no injuries and the helicopter was substantially damaged.

The noise-cancelling headset worn by the pilot may have masked changes in the ‘normal’ sounds of the helicopter. CASA Airworthiness Article 1-43 Noise Isolating Headsets highlights that noise attenuating and noise-cancelling headsets can in some circumstances reduce the effectiveness of aural cues, such as abnormal noises, which might give some warning of unusual operations.

 

Aviation Short Investigations Bulletin - Issue 62

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General details
Date: 06 April 2017 Investigation status: Completed 
Time: 16:00 EST Investigation type: Occurrence Investigation 
Location   (show map):27 km N Silver Plains (ALA) Occurrence type:Forced/precautionary landing 
State: Queensland Occurrence class: Operational 
Release date: 05 September 2017 Occurrence category: Accident 
Report status: Final Highest injury level: None 
 
Aircraft details
Aircraft manufacturer: Robinson Helicopter Co 
Aircraft model: R44 II 
Aircraft registration: VH-MQE 
Serial number: 13338 
Type of operation: Charter 
Sector: Helicopter 
Damage to aircraft: Substantial 
Departure point:Silver Plains Station, Qld
Destination:Silver Plains Station, Qld
 
 
 
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Last update 12 December 2017