ASN Wikibase Occurrence # 228176
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| Date: | Thursday 1 August 2019 |
| Time: | 13:12 LT |
| Type: |  Hughes 369D |
| Owner/operator: | First European Aviation Company SP z.o.o. |
| Registration: | SE-JVJ |
| MSN: | 1127D |
| Fatalities: | Fatalities: 0 / Occupants: 2 |
| Aircraft damage: | Substantial |
| Category: | Accident |
| Location: | Follebu, Gausdal, Oppland Fylke -
 Norway
|
| Phase: | En route |
| Nature: | Survey |
| Departure airport: | |
| Investigating agency: | NSIA |
| Confidence Rating: |  Accident investigation report completed and information captured |
The helicopter carried out line inspection using laser scanning and aerial photography. Approximately 52 minutes into the flight the commander became aware of abnormal vibrations in the helicopter. The vibrations increased in intensity and the commander decided to make an emergency landing on a field. During the last phase of the approach, for approx. 3 meter altitude, the crew heard a bang and the helicopter lost all power. The commander lost control of the helicopter which landed hard. The right skid collapsed, the horizontal stabiliser, and all five main rotor blades were in contact with the ground and were substantially damaged. The crew was uninjured.
Main findings
The helicopter lost all its power to the rotor system due to failure of the input pinion in the main gearbox. The crew noticed vibrations in the helicopter shortly before the failure but did not receive any other warnings. The fact that the input pinion failed at low altitude, was crucial for the crew escaping without injuries.
The input pinion failure was caused by fatigue. However, it has not been possible to determine what caused the fatigue. Regardless of the cause, however, the NSIA is of the opinion that some of the main gearbox maintenance was not performed in accordance with expected standards. Moreover, the NSIA finds that the continuing airworthiness management and the submitted maintenance documentation were inadequate.
Accident investigation:
 |
|
Sources:
https://www.aibn.no/Aviation/Undersokelser/19-669
https://www.gd.no/helikopter-nodlandet-pa-jorde-i-gausdal/s/5-18-953067
http://aerossurance.com/helicopters/h369-mgb-pinion-life-camo/
Media:
Prompt Emergency Landing Saves Powerline Survey Crew After MGB Input Pinion Failure. The pinion had overrun its overhaul life. https://t.co/MJYQryMo65 #helicopter #accident #camo #airworthiness #flightsafety #aviationsafety pic.twitter.com/pYEuluVItG
— Aerossurance (@Aerossurance) August 7, 2021
Revision history:
| Date/time | Contributor | Updates |
|---|---|---|
| 13-Aug-2019 18:59 | Masen63 | Added |
| 14-Aug-2019 17:48 | RobertMB | Updated [Operator, Damage] |
| 26-Jun-2021 18:01 | harro | Updated [Time, Narrative, Category, Accident report] |
| 07-Aug-2021 10:35 | Aerossurance | Updated [Source] |
| 07-Aug-2021 10:46 | Aerossurance | Updated [Embed code] |
| 12-Nov-2023 15:33 | harro | Updated [Other fatalities, Embed code] |
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