Which branch is responsible for repairs related to structural and hydraulic systems?

The responsibility for repairs related to structural and hydraulic systems falls under the SE STRUCTURAL/HYDRAULIC BRANCH. This branch is specifically designated to handle issues and maintenance involving the structural integrity of aircraft components, as well as the hydraulic systems that are crucial for various functions including landing gear operation, flight control actuators, and other systems relying on hydraulic power.

The structural aspect involves ensuring the airframe and other critical components are in good condition, addressing any damage such as dents, cracks, or corrosion. Hydraulic systems require specialized knowledge to maintain and repair, given that they operate under high pressure and are vital for safe aircraft operations.

The other branches, while important in their own rights, focus on different aspects of aircraft maintenance. The SE GAS ENGINE REPAIR BRANCH deals with engine systems, the SE ELECTRICAL REPAIR BRANCH covers electrical components, and the SE COMPONENT REPAIR BRANCH addresses various smaller components. Each of these has its own specialization that does not encompass the structural or hydraulic systems, further clarifying why the SE STRUCTURAL/HYDRAULIC BRANCH is the correct choice for this question.