This is the 12889th most frequent Russian word.
легкомоторного
"Легкомоторного" means "light aircraft" or "light-engine" (relating to small aircraft).
The word 'легкомоторного' modifies the noun 'самолета', indicating the type of aircraft as being lightweight and motor-powered.
Летчик управлял легкомоторного самолета.
The pilot was operating a light aircraft.
Here, 'легкомоторного' is used as an adjective for 'оборудования', referring to light equipment powered by a motor.
Мы проверяем состояние легкомоторного оборудования.
We are inspecting the condition of the lightweight motorized equipment.
In this sentence, 'легкомоторного' describes 'транспорта', meaning transport vehicles that are light and motorized.