 , the shootdown remains the deadliest incident involving a Fokker F-27 and the deadliest aviation incident in South Sudan.During the Second Sudanese Civil War, on 5 August 1986, the SPLA militants announced they would shoot down all unauthorized military or civilian aircraft, claiming that the government was using them to transport soldiers and weapons.Approximately at the time of the 1986 shootdown the militants singled out one humanitarian charter company, alleging that the company had a government contract "to spy on and take aerial photographs of" rebel operations.