You can contribute by submitting additional or updated information.
| Date: | Saturday 23 March 2019 |
| Time: | 18:05 |
| Type: |  Robinson R44 Raven I |
| Owner/operator: | Private |
| Registration: | LN-OGF |
| MSN: | 1449 |
| Year of manufacture: | 2004 |
| Engine model: | Lycoming O-540-F1B5 |
| Fatalities: | Fatalities: 0 / Occupants: 2 |
| Other fatalities: | 0 |
| Aircraft damage: | Destroyed |
| Category: | Accident |
| Location: | Stavnes, Kragerø municipality, Telemark county -
 Norway
|
| Phase: | En route |
| Nature: | Private |
| Departure airport: | Langøy |
| Skien | |
| Investigating agency: | AIBN |
| Confidence Rating: |  Information verified through data from accident investigation authorities |
Two people were flying a private Robinson R44 helicopter from Langøy to Skien. Over Stavnes the commander noticed a power loss. An attemt to autorotate failed and the helicopter hit treetops in a dense firtree forest and fell to the ground. Both of the two on board were injured and the helicopter was destroyed.
The examination of the helicopter wreckage showed that a spark plug on cylinder no. 5 was loose.
This caused an air leakage, increased temperature in the cylinder and damage to an intake valve. Most likely, the spark plug loosened because isufficient torque was applied during installation in connection with a 100-hour inspection conducted in November 2018.
Accident investigation:
 |
|
Sources:
https://www.nrk.no/telemark/ragnhild-_72_-sa-helikopterstyrten_-_--det-sa-ut-som-det-traff-tretoppene-1.14488712
https://www.dagbladet.no/nyheter/tredje-ulykke-siden-nyttar/70908004
https://www.nettavisen.no/nyheter/politiet-varslet-om-helikopterstyrt-i-bamble-i-telemark/3423630377.html
https://www.dagbladet.no/nyheter/overlevde-helikopterstyrt/70910846
http://aerossurance.com/helicopters/latent-defect-r44-nr-droop
https://www.aibn.no/Aviation/Undersokelser/19-263
Media:
Latent Engine Defect Downs R44: NR Dropped to Zero During Autorotation: Crashing into trees decisive in occupants' survival say #NSIA. https://t.co/8O4xGFeuWC #helicopter #accident #flightsafety #aviationsafety #aviationmaintenance #humanfactors pic.twitter.com/doCj5gpYGJ
— Aerossurance (@Aerossurance) October 10, 2020
Revision history:
| Date/time | Contributor | Updates |
|---|---|---|
| 25-Mar-2019 07:06 | Whiteshark | Added |
| 25-Mar-2019 08:52 | RobertMB | Updated [Time, Aircraft type, Registration, Cn, Operator, Other fatalities, Source, ] |
| 25-Mar-2019 08:58 | Whiteshark | Updated [Time, Registration, Location, Source, Narrative, ] |
| 25-Mar-2019 09:09 | RobertMB | Updated [Time, Aircraft type, Registration, Cn, Operator, Other fatalities, Source, ] |
| 26-Mar-2019 07:50 | Whiteshark | Updated [Departure airport, Destination airport, Source, Narrative, ] |
| 26-Mar-2019 18:54 | Whiteshark | Updated [Narrative, ] |
| 02-Apr-2019 18:52 | Aerossurance | Updated [Operator, Location, Phase, Departure airport, Destination airport, Source, Narrative, ] |
| 19-Sep-2020 12:25 | harro | Updated [Time, Narrative, Accident report, Accident report, ] |
| 09-Oct-2020 16:04 | Aerossurance | Updated [Source, Category, Accident report, ] |
| 10-Oct-2020 08:36 | Aerossurance | Updated [Embed code, ] |
Corrections or additions? ... Edit this accident description
The Aviation Safety Network is an exclusive service provided by:
Quick Links:
| ASN Home | Send Correction / Feedback |
| FSF Home | Disclaimer | Copyright |
| Contact Us | Privacy Policy |
| Press / Media |
CONNECT WITH US:
©2025 Flight Safety Foundation