Aviation Maintenance Terms beginning with I

Improper fraction

A fraction with the numerator equal to or greater than the denominator.

---

Inductance

The ability of a coil or conductor to oppose a change in current flow.

---

Inductive reactance

The opposition to the flow of current which inductances put in a circuit.

---

Inductor

A coil of wire that produces inductance in an electrical circuit.

---

Inside calipers

Calipers with outward curved legs for measuring inside diameters, such as diameters of holes.

---

Installation drawing

A drawing that includes all necessary information for a part or an assembly in the final installed position in the aircraft.

---

Insulator

A material that does not conduct electrical current very well or not at all. Examples are glass, ceramic, and plastic.

---

Intergranular corrosion

An attack along the grain boundaries of an alloy that commonly results from a lack of uniformity in the alloy structure.

---

Ion

An atom or group of atoms in which the number of electrons is different from the number of protons. It is a positive ion if the number of electrons is less than the number of protons, and a negative ion if the number of electrons is greater than the number of protons.

---

Isometric drawings

A drawing that uses a combination of the views of an orthographic projection and tilts the object forward so that portions of all three views can be seen in one view

---