Report on accident involving tanker on the E6 road in Mosjøen 19 January 2017
On 19 January 2017, a tanker skidded and rolled off the road on the E6 road north of Mosjøen in Nordland county. The tractor unit and the semi-trailer suffered extensive damage, and the driver died..
The heavy goods vehicle was on its way from Jaren in Oppland county to Tromsø Airport carrying 29,200 litres of de-icing fluid. As it was going through a right curve approximately 10 kilometres north of Mosjøen, the vehicle skidded to the left before it rolled over and came to rest outside the roadway. The bolts fastening the semi-trailer’s coupling mechanism broke in the process, and both the tractor unit and the trailer suffered extensive damage.
The investigation has found that the heavy goods vehicle was travelling at a speed around the critical curve speed for the curve in question. A combination of variable road surface conditions at the site and different tyre properties on the tractor unit and the semi-trailer may have contributed to the trailer skidding.
Extensive technical investigations have been carried out of the fracture surfaces on the bolts that secured the coupling mechanism to the semi-trailer. The investigation shows that the bolts snapped as a result of overload. The AIBN believes that the fastening bolts broke as a result of the heavy goods vehicle rolling over, and were thus was not a contributing factor to the semi-trailer losing its grip on the road and skidding to the left.
No safety recommendations are proposed as a result of this investigation.
|Location||E6, Fustvatnet near Mosjøen in Nordland county|
|Accident type||Tipped over in the roadway|
|Road class||European road|
|Vehicle type||Truck and trailer|
|Type of Transportation||Freight transport|
|Road region||Northern Region|
|Accident category||Ulykke m/ kjøretøy over 7500 kg|