Which shop specializes in the maintenance of auxiliary power units and gas turbine engines?

The specialized focus of the shop that maintains auxiliary power units and gas turbine engines lies within the designation of "AUXILIARY POWER UNITS/SUPPORT EQUIPMENT GAS TURBINE ENGINES." This terminology directly indicates the specific types of equipment that the shop is responsible for, which includes both auxiliary power units (APUs) and gas turbine engines that are critical for aircraft operation.

APUs are essential for providing power to aircraft systems when the engines are not running, while gas turbine engines are central to the propulsion of jets and other aircraft. The combination of these responsibilities in one shop emphasizes expertise in both areas, and it is common in aviation maintenance operations to have designated shops that focus on specialized systems to ensure the highest level of efficiency, safety, and technical proficiency.

In contrast, the other choices, such as the Power Plants Can-uncan Shop, Afterburner Shop, and Propeller Branch, do not specifically indicate a focus on both APUs and gas turbine engines as a primary function. Each of those terms relates to more specific components or systems, which may either be a subset within a broader maintenance shop or focus on different aspects of aircraft operation.