JACK
Lifts, mechanical or hydraulic device for lifting the aircraft.
JACKING POINT
Lifting points, a place on the plane to use the lift.
IRS, sm.-INERTIAL REFERENCE SYSTEM.
JACKSCREW
Leveling screws, rotating a threaded rod that is used to move the movable elements, such as flaps and stabilizer.
JET PIPE
Jet pipe, control some types of valves and mechanisms for controlling the flow of hydraulic or pneumatic systems.
JET PUMP
Reactive-jet pump component in the fuel system, working with the help of fuel pressure to remove water and fuel from the fuel tank.
JOGGLE
Connecting lug, parallel shift in the sheet metal structure so designed as to allow overlay one piece on another, wherein the surface level of the connected part can be above or below the surface of the other piece of material.
JOULE
Joule unit of electricity. Energy ignition system is measured in joules.
JUNCTION BOX
Connection box, a container, which serves as a place for connection of electrical connections. It may also contain electrical components.