On 3rd January, 2019, at about 10:10 h. 2019, a Boeing 737-500 aircraft with registration marks 5N-AIS operated by Azman Air Services Limited on a scheduled commercial flight AZM 2316, departed Lagos for Port Harcourt on an Instrument Flight Rule (IFR) Flight Plan with 109 passengers and five crew on board. The fuel uplift was 8, 900kg. The flight was the first flight of the day for the aircraft. There was no reported technical fault or observation on both engines during the previous flight.
The take-off and climb out phase was normal. Captain was the Pilot Flying (PF) and Co-pilot was the Pilot Monitoring (PM). The aircraft levelled off at a cruising altitude of 29,000 ft (FL 290). According to the Flight Data Recorder (FDR), Engines No. 1 and No. 2 were both showing 84.6% N1 before the engine No 2 malfunction.