On 25th of January 2018, at about 1428hrs, a Gulfstream 200 (G200) with registration marking 5N-BTF, took off from Murtala Mohammed International Airport, Lagos (DNMM) at 1428hrs operating a chartered flight service to Nnamdi Azikiwe International Airport; Abuja (DNAA) with 4 passengers and 3 crew onboard. The commander was the Pilot Flying (PF) and the co-pilot was the Pilot Monitoring (PM).
The departure, cruise and approach to Nnamdi Azikiwe International Airport were uneventful. The 1500hrs ATIS for the airport stated that the wind was from 070o at 7 knots. Visibility 3500m in Haze, No Significant Clouds, the temperature was 33oC/-01oC and the QNH was 1010 hPa. Although Runway 22 was the active runway, the aircraft was cleared for radar vectors for a visual final approach to Runway 22 by ATC. The load sheet recorded that the aircraft’s weight at landing was calculated to be 12,553 kg which required a target threshold indicated airspeed (IAS) of about 134 knots.
At 1516hrs, 8nm to touchdown; 5N-BTF was cleared to continue approach for runway 22.
At 1517hrs, 5N-BTF reported 4nm and was requested to report 2 nm because a preceeding aircraft was already on landing roll. Subsequently, 5N-BTF was cleared to land runway 22. The reported wind by the tower was 070°/07knots.
At 1518hrs, the aircraft landed slightly left of the runway centre line. According to the crew, in the process of controlling, the aircraft started skidding left to right. The crew further reported that, as the brakes were applied, they noticed the aircraft oscillating left and right. The oscillation increased continuously until eventually the aircraft finally swivel on the right shoulder of the runway where it came to a complete stop on a Magnetic Heading of 160o. Skid marks indicated that the aircraft steered in an S-pattern continuously with increasing amplitude down the runway. On the last right turn, the right main wheel went into the grass and on the final left pattern, the right main landing gear strut detached from its main attachment point.
The ATC immediately informed the Airport Rescue and Fire Fighting Services (ARFFS), Radar and other relevant agencies. All persons on board disembarked unhurt.
Instrument Meteorological Conditions (IMC) prevailed at the time of the occurrence.
The accident occurred at about 1520hrs, daylight.