The airline soon signed a contract with DHL , with most of these flights being based out of Brussels Airport . This increased the business sufficiently that Fred . Olsen took delivery of a fourth Electra in 1991 . By 1996 the company was operating six Electras . Fred . Olsen was responsible for the maintenance of the Partnair Convair 580 which crashed as Partnair Flight 394 on 8 September 1989 . Despite that the accident was caused by fraudulent aircraft parts , no-one was charged with criminal offenses
Partnair Flight 394
Partnair Flight 394
Fred. Olsen Airtransport