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-   -   B738 Airspeed Unreliable question (https://www.pprune.org/tech-log/635465-b738-airspeed-unreliable-question.html)

ogorek 13th September 2020 10:10
B738 Airspeed Unreliable question
 
During my sim session I had airspeed unreliable without a reliable indicator recognised during the NNC. During final the Flap Load Relief system went on, flaps retracted to 25. Do you know where the system gets the airspeed from?

Kirks gusset 16th September 2020 21:26
Originally Posted by ogorek (Post 10884196)
During my sim session I had airspeed unreliable without a reliable indicator recognised during the NNC. During final the Flap Load Relief system went on, flaps retracted to 25. Do you know where the system gets the airspeed from?
The flap load relief function is controlled by the FSEU. This receives airspeed information from the left ADIRU. This gets static & pitot pressure inputs from the left air data modules (ADM).


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