On the 14th of March, 2021 at 14:42 h, a Dornier 328-100 aircraft operated by Dornier Aviation Nigeria AEIP (DANA) with nationality and registration marks 5N-BUN departed Port Harcourt Military airport (DNPM) for Murtala Muhammed Airport Lagos (DNMM) as a scheduled passenger flight with number DAV487. The incident flight was the third sector for the day. On board were 20 persons inclusive of two (2) cockpit crew members, one (1) cabin crew member and one (1) aircraft maintenance engineer. Fuel endurance at the time of departure was 3 hours 30 minutes. The Co-pilot was the Pilot Flying (PF) while the Captain was the Pilot Monitoring (PM).