year the last unit was retired. Incidents and accidents On 25 September 1977 the Piper PA-31 Navajo LN-PAA crashed into the sea off Oslo Airport, Fornebu. There were no fatalities, although the aircraft was written off. On 13 March 1987, a chartered Beechcraft King Air (LN-PAG) with six passengers crashed during landing at Stord Airport, Sørstokken, 20 metres ahead of the runway. The aircraft skidded for about 100 metres before coming to rest in a snow bank. There were no injuries. On 8 September 1989, Partnair Flight 394, a Convair CV-580 chartered by a Norwegian shipping company to fly from Oslo to Hamburg crashed off the Skagerrak coast in Denmark near Hirtshals killing all 55 people. References Bibliography Defunct airlines of Norway Airlines established in 1971 Airlines disestablished in 1989 Norwegian companies established in 1971 1989 disestablishments in Norway