AviationOnline for EASA Part-66 & Groundschool

AviationOnline
for EASA Part-66 & Groundschool

Aviation Glossary

An A-Z of all aviation abbreviations

This online glossary provides a comprehensive list of all major aviation abbreviations.


H

HAA

height above the airport

HAT

height above the touchdone zone

HC

harness connector

HCU

hydraulic control unit

HDG

heading

HIRF

high intensity radiated field

HLCS

high lift control system

HF

high frequency

HMU

hydrau-mechanical unit

HMS

heat management system

HP

HP

high pressure

hPa

hectopascals

HPA

high power amplifier

HPC

high pressure compressor

HPSOV

high pressure shut-off valve

HPT

high pressure turbine

HPV

high pressure valve

HSI

horizontal situation indicator

HUD

head up display

HYD

hydraulic

HYDIM

hydraulic interface module

HX

heat exchanger

Hz

hertz

I

IAF

initial approach fix

IAS

indicated airspeed

IATA

International Air Transport Association

IC

intercabinet

ICAO

International Civil Aviation Organization

IDG

intergrated drive generator

IDS

ice detection system

IFR

instrument flight rules

IGN

ignition

IGV

inlet guide valve

IGW

increased gross weight

ILS

instrument landing system

IN

INB

inbound

ind

indicator

INOP

inoperative

INPH

interphone

I/O

inputs/outputs

IOM

input/output module

IP

intermediate pressure

IPC

intermediate pressure compressor

IPC

intermediate pressure check valve

IPT

integrated project team

IPT

intermediate pressure turbine

IR

IRP

integrated refuel panel

IRS

inertial reference system

IRU

inertial reference unit

ISA

International Standard Atmosphere

ISDU

initial system display unit

ISLN

isolation

ISO

isolation

IV

isolation valve

IVD

interactive video downloader

K

KB

keyboard

kg

kilogram

km

kilometer

kt

knot

kVA

kilovolt-ampere