What happens if ice forms in a fuel filter of a gas-turbine-engine fuel system?

The presence of ice in a fuel filter of a gas-turbine-engine fuel system is significant because it can have serious implications for the engine's operation and safety. When ice forms, it can obstruct the fuel flow, which can lead to decreased fuel availability for combustion. This restriction negatively impacts engine performance, potentially causing issues such as loss of power or even engine failure. Additionally, if the fuel flow is interrupted or becomes inconsistent, it can create a safety hazard, as the engine may not operate as intended, especially during critical phases of flight like takeoff or landing.

Thus, recognizing that ice formation can both degrade engine performance and create safety risks highlights the importance of proper fuel system maintenance and monitoring, particularly in colder environmental conditions. This dual risk explains why both effects are captured in the correct answer.