Commercial Pilot License (CPL) Practice Exam 2025 - Free Commercial Pilot License Practice Questions and Study Guide

Fuel-injected systems, while offering numerous advantages such as improved fuel efficiency and better performance, can indeed experience disadvantages, particularly with vapor locks during hot weather. Vapor lock occurs when fuel in the system heats up and vaporizes before it reaches the engine, which can lead to interruptions in fuel flow. This can create significant challenges when trying to maintain engine performance under high temperatures, especially during takeoff or climb, when fuel demands are critical.

The occurrence of vapor lock is a notable concern because it can lead to engine malfunctions or failures, making it essential for pilots and mechanics to consider temperature control and routing of fuel lines in the design and maintenance of aircraft with fuel-injected systems.

Understanding this potential issue is crucial for pilots, as it emphasizes the importance of monitoring operating conditions and performance, particularly in scenarios where ambient temperatures may contribute to this phenomenon.