Which statement best describes the lubrication system?

• A. Self-contained recirculation, dry sump type with no external connections.
• B. The lubrication system uses a dry sump that requires external oil supply.
• C. The lubrication system uses a wet sump with external oil supply.
• D. The lubrication system requires aircraft electrical power to operate.

Answer: (A)

In this engine lubrication approach, the goal is to keep oil flowing to the bearings and gears reliably no matter how the aircraft is maneuvering, using a dry-sump design that recirculates oil within a closed loop. A self-contained dry-sump system means the oil is managed inside the aircraft’s lubrication circuit without needing external oil lines or an external reservoir connected to the rest of the aircraft. The pumps scavenge and return oil within this sealed system, maintaining lubrication even under high-G or inverted flight.

That’s why this option is the best: it emphasizes a self-contained recirculation flow in a dry-sump configuration, with no external connections to an outside oil supply. The other descriptions imply external oil supplies or a different sump type that would require external connections or power, which doesn’t align with the system described here.