On 23 December 1972 at 16:30 , the company 's most fatal accident occurred . F-28 LN-SUY '' Sverre Sigurdson '' on Flight 239 from Ålesund to Oslo crashed at Asker , killing 40 of the 45 people on board , including the crew of three . The cause of the accident was never discovered , although a possibility could have been faults with the instrument landing system
Flight 239
Braathens SAFE Flight 239
Braathens