Flugfelag DH8A at Nuuk on Mar 4th 2011, runway excursion on landing
Last Update: August 22, 2013 / 14:29:35 GMT/Zulu time
Incident Facts
Date of incident
Mar 4, 2011
Classification
Accident
Cause
Runway excursion
Aircraft Type
De Havilland Dash 8 (100)
ICAO Type Designator
DH8A
- A divergence from the operator’s stabilized approach policy caused an unstabilized approach and a hard landing leading to an excess load of the right MLG at touchdown
- The right MLG fuse pin sheared as a result of stress
and summarised:
Adverse wind and turbulence conditions at BGGH led to flight crew task saturation on final approach and a breakdown of optimum cockpit resource management (CRM) resulting in a divergence from the operator’s stabilized approach policy.
The divergence from the operator’s stabilized approach policy caused an unstabilized approach and a hard landing leading to an excess load of the right MLG at touchdown.
According to its design, the right MLG fuse pin sheared as a result of stress.
The HCL analysed that a landing at Nuuk was prohibited according to the operator's procedures due to winds that were between 17 and 42 knots from 140 to 220 degrees.
The HCL continued analysis: "Throughout the approach, a combination of strong winds and moderate to severe orographic turbulence from the surrounding mountainous terrain increased the flight crew load.
Though operating within the general crosswind limitations of the aircraft, the flight crew had difficulties of maintaining stabilized approach parameters. Furthermore, the flight crew at low altitude changed a briefed and prepared decision on the use of landing flap setting.
At altitudes below 500 feet above ground level, the extent of turbulence and flight crew work load increased. The flight crew most likely suffered from task saturation and information overload. No flight crew call outs on divergence from the operator’s stabilized approach policy were made."
The HCL concluded analyis: "The AIB believes that the flight crew was solely focused on landing and that task saturation mentally blocked a decision of going around. Just before the landing phase, the aircraft was not appropriately stabilized in order to make a safe landing."
As a result the airspeed was below stabilized criteria, the aircraft was still banked when the flare was not able to compensate properly resulting in a hard touchdown, the right main gear fuse pin sheared as result of impact force as per design.
Incident Facts
Date of incident
Mar 4, 2011
Classification
Accident
Cause
Runway excursion
Aircraft Type
De Havilland Dash 8 (100)
ICAO Type Designator
DH8A
This article is published under license from Avherald.com. © of text by Avherald.com.
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