What is the purpose of the RAT deployment procedure?

• A. To inflate the emergency raft.
• B. To reset the electrical system after a fault.
• C. To ensure essential systems can be powered if both main power sources fail.
• D. To deploy the landing gear.

Answer: (C)

The RAT deployment procedure is about providing emergency power to essential systems when the aircraft loses both main power sources. The Ram Air Turbine is a small turbine that, once deployed, generates electrical power (and can provide hydraulic power to critical systems as needed) to keep avionics, flight controls, essential instrumentation, and communications alive. This capability ensures the crew can maintain control and manage the aircraft until normal power is restored. It’s not about inflating a raft, resetting faults, or deploying landing gear—all of those are unrelated to the RAT’s purpose.