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A321, Sandefjord Norway, 2006
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Revision as of 12:01, 9 May 2011 by Editor1
|A321 experienced minimal braking action during the daylight landing roll in wet snow conditions and normal visibility and an overrun occurred. The aircraft came to a stop positioned sideways in relation to the runway centreline with the right hand main landing gear 2 metres beyond the limit of the paved surface.|
|Actual or Potential
|Human Factors, Runway Excursion|
|Flight Conditions||On Ground - Normal Visibility|
|Type of Flight||Public Transport (Passenger)|
|Origin||Tenerife Sur/Reina Sofia|
|Take off Commenced||Yes|
|Location - Airport|
|Tag(s)||Inadequate Aircraft Operator Procedures,|
Inadequate Airport Procedures
Data use error,
Procedural non compliance
|Tag(s)||Overrun on Landing,|
Frozen Deposits"Frozen Deposits" is not in the list (Overrun on Landing, Directional Control, Excessive Airspeed, RTO decision after V1, High Speed RTO (V above 80 but not above V1), Unable to rotate at VR, Collision Avoidance Action, Late Touchdown, Significant Tailwind Component, Significant Crosswind Component, ...) of allowed values for the "RE" property.,
|Damage or injury||No|
|Injuries||None"None" is not in the list (Few occupants, Many occupants, Most or all occupants) of allowed values for the "Injuries" property.|
|Fatalities||None"None" is not in the list (Few occupants, Many occupants, Most or all occupants) of allowed values for the "Fatalities" property. ()|
|Causal Factor Group(s)|
On 26 March 2006, an Airbus A321-200 being operated by Danish Airline My Travel Airways Scandinavia (since renamed Thomas Cook Airlines Scandinavia) on a passenger flight from Tenerife to Sandefjord Airport Torp experienced minimal braking action during the daylight landing roll in wet snow conditions and normal visibility at destination and an overrun occurred. The aircraft came to a stop positioned sideways in relation to the runway centreline with the right hand main landing gear 2 metres beyond the limit of the paved surface. After the engines had been shut down, passenger evacuation was accomplished using the forward left hand cabin door only. The aircraft suffered minor damage to the skin and nose landing gear and there were no injuries to the occupants.
An Investigation was carried out by AIBN (the Norwegian AIB). It was established that the First Officer had been designated PF for the landing and that the touchdown, in the presence of a slight tailwind component had been both later than normal and ‘soft’. Reverse thrust was selected but no braking deceleration was detected with autobrake selected so manual braking was attempted with a similar result. As the runway end neared, the aircraft commander took control and attempted to steer the aircraft to the left towards more favourable overrun terrain.
It was concluded that an over-estimation by the flight crew of likely braking effectiveness on a contaminated runway in deteriorating conditions, which had only been notified to them at a late stage in the approach, was the primary reason for the failure to decelerate normally.
The AIBN noted that the accident was “similar to several other runway excursions on slippery runways in Norway (in recent years, which) have many similar causal factors”. It was of the view that there were no safety benefits in individually investigating all these occurrences and advised that it was therefore working on a general report on "Winter Operations and Friction Measurements'. That report would highlight the common causal factors found in this type of event and would specifically highlight safety areas of general nature which are outside of the aircraft operators’ direct area of responsibility.
Since some specific matters disclosed by the Investigation were deemed to require action ahead of the issue of the general report, 5 Safety Recommendations were made:
- Safety Recommendation SL no. 2010/04T
Upon touchdown on runway contaminated by 8 mm new snow, with an air temperature of -2° C and dew point temperature of -3° C, the crew experienced very POOR Braking Action, whereas the reported was MEDIUM. AIBN recommends that My Travel Airways Scandinavia / Thomas Cook Airlines Scandinavia evaluate if the procedures for use of the Airbus concept of “fluid contamination” allow the required safety margins when calculating landing distances on contaminated runways.
- Safety Recommendation SL no. 2010/05T
- Safety Recommendation SL no. 2010/06T
- Safety Recommendation SL no. 2010/07T
- Safety Recommendation SL no. 2010/08T
During the landing on a slippery runway OY-KVA collided with a Localiser Monitoring Antennae basement which protruded above the runway surface. AIBN recommends that Sandfjord Airport Torp perform a risk assessment regarding the safety zones adjacent to the runway.
The AIBN Final Report (AIBN Report SL 2010/05) was published on 9 March 2010.