What could indicate a fuel leak in an aircraft?

An indication of a fuel leak in an aircraft is typically characterized by unusual fuel consumption, fuel odors, or visual evidence of fuel pooling. When an aircraft experiences a fuel leak, it often manifests as a discrepancy between the expected and actual fuel usage, resulting in unusual consumption patterns. Additionally, the presence of fuel odors is a strong indicator of potential leakage, as fuel vaporizes and can be smelled if there's a leak. Visual evidence of fuel pooling beneath the aircraft or on various components also confirms the presence of a leak.

Normal fuel consumption, consistent pressure readings, and increased engine temperature do not accurately signal a fuel leak. Normal consumption suggests that the aircraft is operating as expected, without any issues related to fuel delivery. Consistent pressure readings imply that the fuel system is functioning correctly and maintaining the right pressure levels for proper engine operation. Increased engine temperature could point to other issues such as engine inefficiencies but does not specifically indicate a fuel leak.