There is the sentence:

Electrical signals from the three sources are relayed to the brakes and steering control unit (BSCU) and are computed into the nose steering angle.

The question: What are these sources and where they located?

  • 2
    $\begingroup$ Where have you extracted this sentence from? $\endgroup$
    – Afe
    Commented Mar 13, 2019 at 23:45

1 Answer 1


I don't know where your text is from, but the 3 sources are:

The BSCU receives orders from:

‐ The Captain's and the First Officer’s steering hand wheels (orders added algebraically),
‐ The rudder pedals,
‐ The autopilot.

The BSCU transforms these orders into nose wheel steering angle.

(A320 FCOM DSC-32-20-10)


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