Scary situation on rooftop-helipad
Join Date: Feb 2006
Location: South Africa
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Tail Rotor
Well with my big lack in knowledge of flying twins and the 412.. I thought i would give it a shot as everyone else has done here. Right yaw to me indicates a tail problem... Was not on the pedals when got airborne for some reason and possibly kicked in loads of left, the wind didnt help the situation(LTE? whats the chances of Lte on a machine like this?). Anything kick up into the tail rotor? We cant see much. But this to me looks like a tail problem or pilot pedal problem. Is there chance you spool down one engine and not the other and he got airborne meaning he had lack of rpm and tail authority. Once again I point out out my lack of knowledge of twins and the 412.
Join Date: Dec 2007
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ASN Aircraft accident 09-MAR-2011 Bell 412 OE-XYY
Date:09-MAR-2011 Time:10:45 LT Type:Bell 412 Operator:Heli Austria Registration: OE-XYY C/n / msn: 36041 Fatalities:Fatalities: 0 / Occupants: 3 Other fatalities:0 Airplane damage: Unknown Location:Innsbruck Hospital Helipad - 
Austria Phase: Take off Nature:Ambulance Departure airport:Innsbruck Hospital Destination airport:LOWI Narrative:
The Bell 412 helicopter had finished unloading a patient at the helipad of Innsbruck hospital (54m above ground) near town center of Innsbruck, when strong resonances occurred in the helicopter which led to an uncontrolled take-off. The pilot managed to get the helicopter under control and made an emergency landing at nearby Innsbruck airport, where again strong resonances occurred.
The Bell 412 is in use by Heli Austria only since July 2010.
Austria Phase: Take off Nature:Ambulance Departure airport:Innsbruck Hospital Destination airport:LOWI Narrative:The Bell 412 helicopter had finished unloading a patient at the helipad of Innsbruck hospital (54m above ground) near town center of Innsbruck, when strong resonances occurred in the helicopter which led to an uncontrolled take-off. The pilot managed to get the helicopter under control and made an emergency landing at nearby Innsbruck airport, where again strong resonances occurred.
The Bell 412 is in use by Heli Austria only since July 2010.
I can see what ST and Gordy mean by something caught in the MR, but I'm convinced this is just colour bleed in the poor quality rendering. I've been through it, frame by frame and the red (and green) colour is almost always only seen on the right hand side of the image, regardles of the machine's attitude.
It does yaw slightly to the right before it lifts possibly indicating the uncommanded (and unexpected) rise of the collective? The weird bit though, is the very aggressive left roll in the middle of the 15th second. That has nowt to do with TR control, but a mighty bucket load of left cyclic!!
It does yaw slightly to the right before it lifts possibly indicating the uncommanded (and unexpected) rise of the collective? The weird bit though, is the very aggressive left roll in the middle of the 15th second. That has nowt to do with TR control, but a mighty bucket load of left cyclic!!
