How many PCUs power a spoiler?

How many PCUs power a spoiler?

• A. 1 PCU per spoiler
• B. 2 PCUs per spoiler
• C. 3 PCUs per spoiler
• D. 4 PCUs per spoiler

Answer: (A)

Power to move a spoiler comes from its own dedicated Power Control Unit. Each spoiler panel has a single PCU that takes the electrical command and provides the hydraulic flow to position that panel. This one-to-one arrangement lets each spoiler operate independently, so deployment of one panel isn’t affected by others and faults are isolated to the affected panel. Using more than one PCU for a single spoiler would add unnecessary complexity and potential conflicts, so the design uses one PCU per spoiler.

Power to move a spoiler comes from its own dedicated Power Control Unit. Each spoiler panel has a single PCU that takes the electrical command and provides the hydraulic flow to position that panel. This one-to-one arrangement lets each spoiler operate independently, so deployment of one panel isn’t affected by others and faults are isolated to the affected panel. Using more than one PCU for a single spoiler would add unnecessary complexity and potential conflicts, so the design uses one PCU per spoiler.