30th Nov 2022 crash, Mentone Victoria
Final report, still had at least 60 litres of fuel, engine had stopped prior to crash.
Findings
As the helicopter climbed to about 650 ft above ground level, the engine lost power. The reason for the power loss was not determined. A detailed examination of the engine and airframe was not performed, limiting the ability to identify the reason for the power loss
The power loss was not immediately recognised which limited the opportunities for a safe forced landing. During the forced landing, the helicopter did not have sufficient height to reach the selected landing area and collided with rooftops
https://www.atsb.gov.au/sites/defaul...63%20Final.pdf
Findings
As the helicopter climbed to about 650 ft above ground level, the engine lost power. The reason for the power loss was not determined. A detailed examination of the engine and airframe was not performed, limiting the ability to identify the reason for the power loss
The power loss was not immediately recognised which limited the opportunities for a safe forced landing. During the forced landing, the helicopter did not have sufficient height to reach the selected landing area and collided with rooftops
https://www.atsb.gov.au/sites/defaul...63%20Final.pdf
Hmmmm - another one of life's "little mysteries"?
Can't find a defect report for the failure so .................?
ATSB seem to have taken a hell of a long time and money to basically say - let me see - "nothing".
Can't find a defect report for the failure so .................?
ATSB seem to have taken a hell of a long time and money to basically say - let me see - "nothing".
29" on the MP gauge ? The absolute max is 27.2 before you go full throttle. I would suggest if the pilot had got to 29 inches then he would be vastly over pitching and the blades would be coning up at one hell of an angle and the ac would be descending. Had the pilot tried pulling too much power, overpitched and stuffed it in ?( hence a couple of the blades dont seemed to have hit the roof ( as going really slowly ). Would account for not determining power loss !!!
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KMSS very possibly ( but the manifold pressure would show that if the engine had stopped) the engine at idle 1600 rpm is around 12 inches of MP but it would appear that from the investigation there was not a problem with the engine ????
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H500 - Yes, not much to go on.
I noticed this in the report: "...a visual inspection of the engine cooling fan and fan shroud indicated that the engine was not running at the time of the accident. The degree of damage to the rotor blades also indicated that the engine was providing little or no power."
I'm not a helicopter pilot but I wondered if the 269C has a governor which would have been opening the throttle as power output and engine RPM decayed for unknown reasons, leading to the increasing MAP...
I noticed this in the report: "...a visual inspection of the engine cooling fan and fan shroud indicated that the engine was not running at the time of the accident. The degree of damage to the rotor blades also indicated that the engine was providing little or no power."
I'm not a helicopter pilot but I wondered if the 269C has a governor which would have been opening the throttle as power output and engine RPM decayed for unknown reasons, leading to the increasing MAP...
I find it difficult to believe that a more serious investigation of the engine lack of power wasnt performed.Is there a root cause of engine problems with HIO 360D1A's ( i would like to know my school uses 3 of them ). The engine must have been providing some power otherwise the student would have to have been in immediate autorotation which doesnt seem to be the case. Looking at the pictures the engine area and scroll look pretty intact
