Jackscrew
A hardened steel rod with strong threads cut into it. A jackscrew is rotated by hand or with a motor to apply a force or to lift an object.
Aviation Maintenance Technician Handbook — Airframe, p. G-20
The curriculum
Glossary
2,678 terms. Where the regulation defines a term (14 CFR 1.1 and 1.2, 280 of them), its definition is quoted word for word, and it governs. The FAA handbooks' definitions follow as guidance, each with the page of the handbook that prints it.
J
Jet fuel
Fuel designed and produced to be used in aircraft gas turbine engines.
Aviation Maintenance Technician Handbook — Powerplant, p. G-16
Taught in GEN-F Concepts, GEN-F Procedures, GEN-F Quick reference, GEN-H Concepts.
Jet propulsion
A method of propulsion by accelerating a relatively small mass of air through a large change in velocity.
Aviation Maintenance Technician Handbook — Powerplant, p. G-16
Jet pump
A special venturi in a line carrying air from certain areas in an aircraft that need an augmented flow of air through them. High-velocity compressor bleed air is blown into the throat of a venturi where it produces a low pressure that pulls air from the area to which it is connected. Jet pumps are often used in the lines that pull air through galleys and toilet areas.
Aviation Maintenance Technician Handbook — Airframe, p. G-20
Jet route
A route designated to serve flight operations from 18,000 feet MSL up to and including FL 450.
Jet stream
A high-velocity narrow stream of winds, usually found near the upper limit of the troposphere, which flows generally from west to east.
Jeweler’s file
A small, fine-cut, metalworking file used by jewelry manufacturers.
Aviation Maintenance Technician Handbook — Powerplant, p. G-16
Joggle
A small offset near the edge of a piece of sheet metal. It allows one sheet of metal to overlap another sheet while maintaining a flush surface.
Aviation Maintenance Technician Handbook — Airframe, p. G-20
Jointer
A woodworking power tool used to smooth edges of a piece of wood.
Aviation Maintenance Technician Handbook — Airframe, p. G-20
Joule
The amount of work done by a force of one newton when it acts through a distance of one meter.
Also defined in 1 more source
A measure of energy. In terms of electrical energy, one joule is equal to one watt-second.
Aviation Maintenance Technician Handbook — Powerplant, p. G-16
Journal (bearing)
A hardened and polished surface on a rotating shaft that rides in a plain bearing.
Aviation Maintenance Technician Handbook — Powerplant, p. G-16
Judgment
The mental process of recognizing and analyzing all pertinent information in a particular situation, a rational evaluation of alternative actions in response to it, and a timely decision on which action to take.
Taught in AF-B Concepts, PP-B Concepts, AF-A Quick reference, AF-D Concepts, GEN-B Concepts, GEN-I Concepts and 16 more.
Sources
- 14 CFR 1.1
- 14 CFR 1.1, General definitions
- 14 CFR 1.2
- 14 CFR 1.2, Abbreviations and symbols
- AMTG
- FAA-H-8083-30B, Aviation Maintenance Technician Handbook — General
- AMTA
- FAA-H-8083-31B, Aviation Maintenance Technician Handbook — Airframe
- AMTP
- FAA-H-8083-32B, Aviation Maintenance Technician Handbook — Powerplant
- W&B
- FAA-H-8083-1B, Aircraft Weight and Balance Handbook
- HFH
- FAA-H-8083-21B, Helicopter Flying Handbook
- PHAK
- FAA-H-8083-25C, Pilot's Handbook of Aeronautical Knowledge
The glossary is CC BY-SA 4.0 as an arrangement; the quoted regulation text is a work of the US Government. Handbook definitions are quoted from the FAA's handbooks, each linked to the FAA's own copy.