Date:	Wednesday 16 January 2019
Time:	11:30 LT
Type:	Robinson R44 Raven I
Owner/operator:	Airport Helicopter AHB AG
Registration:	HB-ZDW
MSN:	1147
Year of manufacture:	2001
Engine model:	Lycoming O-540-F1B5
Fatalities:	Fatalities: 0 / Occupants: 4
Other fatalities:	0
Aircraft damage:	Substantial
Category:	Accident
Location:	Luzern/Beromünster Airport (LSZO), Luzern -   Switzerland
Phase:	Take off
Nature:	Training
Departure airport:	Luzern-Beromünster Airfield (LSZO)
Destination airport:	Luzern-Beromünster Airfield (LSZO)
Investigating agency:	STSB
Confidence Rating:	Accident investigation report completed and information captured

Narrative:
The helicopter (operated by Airport Helicopter AHB AG and owned by IRM Helicopter und Immobilien AG) crashed upon takeoff after engine failure. During the forced landing, a skate caught in the ground, knocking down the aircraft. The pilot and the three passengers escaped without scratches.

Analysis and conclusions
The technical investigations revealed no indication of a possible cause that could have led to the engine failure. Assuming that the carburettor preheater was fully open, carburettor icing appears unlikely as the cause of the engine failure.
The cause of the engine failure, as a result of which the helicopter sank into the soft grassland with the left skid of the landing gear during the subsequent emergency landing and subsequently tipped onto its side, could not be determined.
By immediately initiating autorotation in the initial climb, the pilot managed to stabilise the rotor speed and steer the helicopter back to the airfield in a left turn. Due to the soft ground, the left skid of the landing gear sank in during the glide landing, causing the helicopter to tip uncontrollably over its right side.

https://www.bluewin.ch/de/news/vermischtes/heli-erleidet-totalschaden-in-beromunster-202623.html
____________________________________
https://www.heli-archive.ch/en/helicopters/helicopter-accidents/16012019-robinson-r-44-raven-hb-zdw-lucerne-beromuensterlu/
https://www.jetphotos.com/photo/8492993 (photo)

Source: Luzerner Polizei

Beromünster (LU): Un hélicoptère se renverse après son décollage - News Suisse: Faits divers. https://t.co/QY3Orm6JEr

— Switzerland News (@Switzerland) 17 janvier 2019

Beromünster LU: Motor eines Helikopters fällt nach Start aus – niemand verletzt https://t.co/0FuGJz9SFw

— polizei.news (@polizeiCH) 17 janvier 2019

Date/time	Contributor	Updates
17-Jan-2019 14:17	gerard57	Added
17-Jan-2019 15:41	RobertMB	Updated [Aircraft type, Registration, Cn, Operator, Location, Nature, Departure airport, Source, Narrative, ]
17-Jan-2019 16:41	Iceman 29	Updated [Time, Operator, Location, Source, Embed code, ]
17-Jan-2019 16:48	Iceman 29	Updated [Destination airport, Embed code, Narrative, ]
17-Jan-2019 17:36	harro	Updated [Photo, ]
13-Nov-2023 11:53	harro	Updated [Aircraft type, Other fatalities, Departure airport, Destination airport, Damage, Narrative, Accident report, ]
04-Dec-2023 14:35	harro	Updated [Other fatalities, ]