DHL B722 at Lagos on Sep 7th 2006, overran runway, nose gear separated
Last Update: February 19, 2013 / 17:27:01 GMT/Zulu time
Nigeria's Accident Investigation Bureau (NAIB) released their final report concluding the probable causes of the accident were:
The decision of the crew to continue an unstabilised approach despite the prevailing adverse weather condition.
- The captain did not take over the control of the flight from the first officer in the known bad weather situation
- The crew resource management was inadequate.
The NAIB reported that the aircraft weighed 159888 lbs at landing, MLW was 160,000 lbs. Vref for flaps 30 and MLW was 137 knots.
The NAIB analysed: "With all the weather and speci reports, the captain should have taken over control from the first officer before landing but did not. With 600m visibility, squall and heavy rain, sky obscured, the decision to land by the crew was not appropriate particularly when the co-pilot was the pilot flying. The co-pilot in his statement saw the approach light at 430ft." and repeated: "The weather existing at the time of the accident and the unstable approach should have made the captain to take over from the first officer and discontinue with the approach and landing. The decision by the captain to go ahead and land under the severe weather condition was unprofessional, and shows inability to interpret the weather condition accurately."
With regards to the brief time the thrust reversers were stowed and positive acceleration occurred during landing, the NAIB analysed: "The positive longitudinal acceleration during the landing roll contributed to the amount of runway overrun as the airplane departed the runway at a greater airspeed than if the deceleration had remained throughout the landing roll."
The NAIB analysed that even with the thrust reversers maintained open during the entire roll out the aircraft would not have been able to stop before the end of the runway, however would have exited the runway at a much lower speed.
Two safety recommendations were released as result of the investigation.
This article is published under license from Avherald.com. © of text by Avherald.com.
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