On 9th April 2016, at about 17:11 h, a B737-500 with nationality and registration marks 5N-BLG operated by Aero Contractors Company of Nigeria Ltd departed Port Harcourt International Airport (DNPO) on a scheduled commercial flight for Murtala Muhammed International Airport, Lagos (DNMM) with call sign NIG316. There were 64 persons onboard inclusive of five crew members.
The Captain was the Pilot Monitoring (PM) while the Co-pilot was the Pilot Flying (PF). An Instrument flight rules (IFR) flight plan was filed.
The crew had flown three previous sectors with the same aircraft and the incident flight was the fourth and last flight for the day. According to the crew, destination weather forecast was reported as visibility 8km in thunderstorms and rain.
At about 25 NM to LAG VOR, the crew observed rain on the weather radar around DNMM. Prevailing weather information reported rain overhead the station with a visibility of 3,000 m.
The aircraft was cleared for approach on runway 18L. During final approach in the rain, the crew encountered a crosswind component ranging from 38 – 45 kt on the Flight Management Computer (FMC). Based on this, the crew executed a go-around at an altitude of about 500 ft and requested for ILS approach for Runway 18R which was granted by the Tower. ATC passed weather information as: wind 090o/15 kt with a visibility of 3,000 m in moderate rain.