Practice question

A blend-door actuator clicks repeatedly and the cabin temperature does not change with control input. What is the likely fault?

  1. A failed blend-door actuator or a jammed/broken blend door preventing it from reaching commanded position
  2. A low tire
  3. A discharged fire extinguisher
  4. A bent stop arm

Answer: A — A failed blend-door actuator or a jammed/broken blend door preventing it from reaching commanded position

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