In an electrical emergency, which statement about the Ram Air Turbine is true?

In an electrical emergency, which statement about the Ram Air Turbine is true?

• A. To provide emergency power (and optionally emergency hydraulics) when normal power sources are unavailable.
• B. To maintain cabin pressure during unpressurized events
• C. To provide bleed air for cabin conditioning
• D. To actuate the landing gear

Answer: (A)

The Ram Air Turbine serves as a backup power source in an electrical emergency. When normal generators are unavailable, the RAT deploys into the airstream, using ram air to spin a turbine that drives a generator to provide emergency electrical power to essential systems. In some configurations, it can also supply emergency hydraulic power to support critical systems. This keeps essential avionics and controls powered so the crew can continue to fly and land safely. The other functions listed—maintaining cabin pressure, providing bleed air for cabin conditioning, or actuating the landing gear—are not roles of the RAT, which is why the statement about providing emergency power (and optionally emergency hydraulics) is the correct one.

The Ram Air Turbine serves as a backup power source in an electrical emergency. When normal generators are unavailable, the RAT deploys into the airstream, using ram air to spin a turbine that drives a generator to provide emergency electrical power to essential systems. In some configurations, it can also supply emergency hydraulic power to support critical systems. This keeps essential avionics and controls powered so the crew can continue to fly and land safely.

The other functions listed—maintaining cabin pressure, providing bleed air for cabin conditioning, or actuating the landing gear—are not roles of the RAT, which is why the statement about providing emergency power (and optionally emergency hydraulics) is the correct one.