GLF4, Abuja Nigeria, 2018

GLF4, Abuja Nigeria, 2018

Summary

On 12 September 2018, a Gulfstream G-IV overran the runway at Abuja after the air/ground status system failed to transition to ground on touchdown and the crew were slow to recognise that as a result neither spoilers nor thrust reversers had deployed. In the absence of recorded flight data, it was not possible to establish why the air/ground sensing system did not transition normally but no fault was found. The aircraft operator’s procedures in the event of such circumstances were found to be inadequate and regulatory oversight of the operator to have been comprehensively deficient over an extended period.

Description

On 12 September 2018, a Gulfstream G-IV (5N-BOD) being operated by SkyBird Air on a non-revenue domestic positioning flight from Lagos to Abuja overran the 3610 metre-long runway 22 at destination after touchdown following an ILS approach in night VMC and finally stopped in mud approximately 70 metres beyond its end. None of the six occupants were injured but two approach lights were impact-damaged by the aircraft landing gear and aircraft right hand flap was damaged by debris impact during the overrun.

Investigation

An Accident Investigation was carried out by the Nigerian Accident Investigation Bureau (AIB) but its scope was hampered by the discovery following recovery of both the SSFDR and the CVR from the aircraft that the former had not recorded any relevant data for over 2 years and that the latter had also not been recording any data for a prolonged period previously.

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