Where is the oil for the emergency oil system located?

Where is the oil for the emergency oil system located?

• A. Tank A
• B. Reservoir C
• C. Sumps A and B
• D. Main sump

Answer: (C)

The emergency oil system is backed by its own dedicated oil supply, kept in the two sumps in the transmission/engine area. When the main oil pressure path fails, an emergency pump draws oil from Sumps A and B to continue lubricating critical gears and bearings for a short period, allowing safe control and landing. This is why the correct source is the two sumps rather than the main sump or other tanks—the emergency system uses its own reserve to ensure lubrication when the primary system is not available.

The emergency oil system is backed by its own dedicated oil supply, kept in the two sumps in the transmission/engine area. When the main oil pressure path fails, an emergency pump draws oil from Sumps A and B to continue lubricating critical gears and bearings for a short period, allowing safe control and landing. This is why the correct source is the two sumps rather than the main sump or other tanks—the emergency system uses its own reserve to ensure lubrication when the primary system is not available.