Beschrijving:A Swearingen SA.227AC Metro III, OY-NPB, sustained substantial damage in a runway excursion accident at Oslo-Gardermoen (OSL), Norway. None of the eleven occupants were injured.
|Datum:||02 MRT 2011|
|Type:||Swearingen SA227-AC Metro III|
|Vloog voor:||Air Norway|
|Gehuurd van:||North Flying|
|Motoren:|| 2 Garrett TPE331-11U-612G|
|Bemanning:||slachtoffers: 0 / inzittenden: 2|
|Passagiers:||slachtoffers: 0 / inzittenden: 9|
|Totaal:||slachtoffers: 0 / inzittenden: 11 |
|Gevolgen:|| Written off (damaged beyond repair)|
|Plaats:||Oslo-Gardermoen Airport (OSL) (Noorwegen)
|Fase:|| Landing (LDG)|
|Soort vlucht:||Binnenlandse lijnvlucht|
|Vliegveld van vertrek:||Ørland Airport (OLA/ENOL), Noorwegen|
|Vliegveld van aankomst:||Oslo-Gardermoen Airport (OSL/ENGM), Noorwegen|
The airplane operated on scheduled flight M3990 from OLA (Ørland) to OSL. During roll-out following a normal landing, when the aircraft's speed had decreased to less than 60 kt, the aircraft started an uncommanded turn to the right. The nose wheel steering system was activated. The course could not be corrected, and the aircraft veered off the side of the runway where it became stuck in hard-packed snow one metre deep.
The investigation has shown that the loss of control was most likely caused by a fault in the nose wheel steering. The same problem had occurred six days earlier, but the commander then managed to disconnect the nose wheel steering in time and regained control. The fault could not be reproduced, and the aircraft was released to service after inspection and testing without remarks.
The nose wheel steering system on this aircraft type is relatively complex, and over time several improvements have been made to improve its reliability. The Flight Manual has a caution related to activation of nose wheel steering at speeds higher than normal taxi speed.
There was some freezing rain/freezing fog at the time of the accident.
METAR: ENGM 280241Z 19003KT 7000 FEW009 BKN025 M05/M06 Q1027
Comprehensive technical examination of the nose wheel steering on OY-NPB uncovered no single causal factor, but some indications of unsatisfactory maintenance. Irregularities that alone or in combination could have caused a temporary fault with the steering were present. The Accident Investigation Board believes that a temporary fault caused the nose wheel to unintentionally lock itself in a position towards the right. No other defects or irregularities that could explain why the aircraft veered off the runway were found.
» AIBN Norway
Deze kaart geeft het vliegveld van vetrek weer en de geplande bestemming van de vlucht. De lijn tussen de vliegvelden geeft niet
de exacte vliegroute weer.
De afstand tussen Ørland Airport en Oslo-Gardermoen Airport bedraagt 394 km (247 miles).
This information is not presented as the Flight Safety Foundation or the Aviation Safety Network’s opinion as to the cause of the accident. It is preliminary and is based on the facts as they are known at this time.