par Beochien Ven 9 Aoû 2013 - 17:24
Un AD sérieux aux USA, suite à l'atterro sur le ventre d'un A320 Wizz Air à Fiumicino !
Un PB récurrent entre trappes de train et actuators ... bon, c'est toujours étonnant que des PB de ce type apparaissent sur des séries existantes depuis plus de 20 ans !
Pas glorieux tout ça, ça traîne depuis 2006 !
http://www.aviationweek.com/Article.aspx?id=/article-xml/avd_08_09_2013_p01-01-605125.xml&p=1
Je cite :
The failures stem from deteriorating main landing gear (MLG) door actuator damping and retaining rings, which release metallic debris into the actuators.
Early signs of the problem include a slow gear door sequence. While it doesn’t disrupt the gear operation, the slow door opening is supposed to generate specific Centralized Fault Display System (CFDS) messages that “that are necessary to mitigate risks with failure of MLG extension or down-locking,” FAA says in its AD.
The actuator problems were first reported in 2006. In 2008, Airbus introduced a new actuator, but the problem persisted. In 2011, the European Aviation Safety Agency (EASA) ordered operators to monitor CFDS messages and, if specific ones were generated indicating slow door sequences, verify the MLG doors were working correctly.
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JPRS