AMP - Aviation Maintenance Technician Powerplant Practice Exam

Which of the following is a good indication of a malfunctioning fuel nozzle when inspecting the exhaust section of an aircraft turbine engine?

1. Buckling of the combustion liner

2. Hotspots on the tail cone

3. Carbon build up in the exhaust

4. All of the above

The correct answer is: Hotspots on the tail cone

Possible explanation When inspecting the exhaust section of an aircraft turbine engine, hotspots on the tail cone are a good indication of a malfunctioning fuel nozzle. This is because a malfunctioning fuel nozzle can cause uneven fuel distribution, resulting in higher temperatures in certain areas, which can lead to hotspots on the tail cone. Options A, C, and D are not correct because buckling of the combustion liner and carbon build up in the exhaust can have other causes and may not necessarily indicate a problem with the fuel nozzle. Additionally, option D, which includes all of the above choices, is not the best answer because it is more accurate to say that hotspots on the tail cone are a specific indication of a malfunctioning fuel nozzle, rather than grouping all the choices together as a general sign of a problem.