Plain English Meaning

All the working systems that make an aircraft run -- the engine and its support systems, the electrical system, the landing gear, the heating and cooling, and so on -- considered together as a group.

Full Definition

The collective term for the major mechanical and operational systems built into an aircraft's structure that support flight, including powerplant, propeller, induction, ignition, fuel, oil, cooling, exhaust, electrical, landing gear, and environmental control systems.

Context Anchor

Seen in aircraft systems study, preflight inspection, discussions, and when how equipment such as landing gear, , electrical , and power works.