A

A - Aircraft Airplane (JAR-FCL 1 License)
ALTP - Airline Transport Pilot(s Licence)
AME - Aero Medical Examiner (FAA, JAA)
AQC - Airline Qualification Course
ATC - Air Traffic Control
ATCO - Air Traffic Control Officer
ATM - Air Traffic Management
ATP – Airline Transport Pilot
ATPL - Airline Transport Pilot ('s Licence)
ATPL Frozen – Airline Transport Pilots Theory courses

B

BITD – Basic Instrument Training Device

C

C - Celsius (Centigrade)
CAA - Civil Aviation Authority (of a country)
CCQ – Cross Crew Qualification
CEAC - Conférence Européenne de l'Aviation Civile (see ECAC)
CFI - Certified Flight Instructor (USA)
CFII - Certified Flight Instructor IFR (USA)
COPI - Co-Pilot
CPL - Commercial Pilots Licence
CR - Class Rating
CRE - Class Rating Examiner
CRI - Class Rating Instructor
CRM - Cockpit Resource Management

D

DGR - Dangerous Goods Rating

E

EASA - European Aviation Safety Authority (planned to replace JAA)
ECAC - European Civil Aviation Conference ("Association" of Europe's CAAs)
EUAPA - European Union Airplane Pilots Association

F

FAA - Federal Aviation Administration
FBO - Fixed Base Operator
FCL - Flight Crew Licensing
FE - Flight Examiner
FFS – Full Flight Simulators
FI - Flight Instructor
FIE - Flight Instructor Examiner
FMS - Flight Management System
FNPT - Flight Navigation and Procedure Trainer
FSTD - Flight Simulation Training Device
FTD - Flight Training Device (lower category "simulator")
FTO - Flight Training Organisation (Flight School)

G

GA - General Aviation (mainly private and business aviation)
GFT - General Flight Test (JAR-FCL)
GLS - GPS Landing System
GPS - Global Positioning System (USA GNSS), see also FAA GPS Product Team

H

H - Helicopter (JAR-FCL 2)
HEL - Helicopter
HF – Human Factors
HPA – High Performance Aircraft
HT – Head of Training

I

IAOPA - International Council of Aircraft Owner and Pilot Associations
IAOPA-EUR - IAOPA European Region
ICAO - International Civil Aviation Organisation (a UN-Suborganisation)
IFR - Instrument Flight Rules ("all" weather operations rules)
ILS - Instrument Landing System
IMC - Instrument Meteo Conditions (weather requiring IFR flight)
IPPL - National (ICAO) Private Pilots License (AOPA internal abbreviation)
IR - Instrument Rating
IRE - Instrument Rating Examiner

J

JAA - Joint Aviation Authorities (CAA of Europe)
JAR - Joint Aviation Recommendation (as used in some JAA documents, reported false!)
JAR - Joint Aviation Regulation (as used in some JAA documents, reported false!)
JAR - Joint Aviation Requirement
JAR-1 - JAR on Definitions and abbreviations
JAR-22 - JAR on Sailplanes and and Powered Sailplanes
JAR-25 - JAR on Large Airplanes
JAR-36 - JAR on Aircraft Noise
JAR-145 - JAR on Approved Maintenance Organisations
JAR-147 - JAR on Maintenance Training
JAR-APU - JAR on Auxiliary Power Units
JAR-AWO - JAR on All Weather Operations
JAR-E - JAR on Engines
JAR-FCL - JAR on Flight Crew Licensing
JAR-MED - JAR on Medical
JAR-P - JAR on Propellers
JAR-TSO - JAR on Technical Standard Orders
JAR-OPS - JAR on Flight Operations
JAR-VLA - JAR on Very Light Aeroplanes
JPPL - JAR-FCL Private Pilots License (AOPA internal abbreviation)

L

LPC - Line Proficiency Checks

M

MCC - Multi-Crew Certificate (JAR-FCL)
MCC - Multi-Crew Cooperation
MCCI - Multi-Crew Certificate Instructor
ME - Multi Engine
MEP - Multi Engine Piston
MP - Multi-Pilot
MPA - Multi-Pilot Aeroplane
MPH - Multi-Pilot Helicopter
MPL – Multi Pilot Licence

N

NAA - National Aviation Authority (generic term within JAA)
NPPL - National (ICAO) Private Pilots License (AOPA internally used: IPPL)
NVFR - Night VFR

O

OACI - Organisation de l'Aviation Civile Internationale (voir ICAO)
OPC – Operator Proficiency Checks
OPS - Operations (or Operating hours)
PiC - Pilot in Command

P

PPL- Private Pilots Licence (general)
PPL A - Private Pilots Licence Aeroplane
PPL H - Private Pilots Licence Helicopter
PPL/IR - Association of PPL holders with Instrument Rating

R

R - Rating
RF - Registered Facility ("national" flight school as per JAR-FCL)
RPPL - Restricted PPL

S

SE - Single-Engine
SEL - Single-Engine Land
SEP - Single-Engine Piston
SEP – Safety and Emergency Equipement Training
SFE - Synthetic Flight Examiner
SFI - Synthetic Flight Instructor
SIM - Simulator
SMEL - Single/Multi Engine Land
SP - Single Pilot
SPA - Single Pilot Aeroplane
SPH - Single Pilot Helicopter
SPIC - Student Pilot in Command (JAR-FCL)
STD - Synthetic Training Device

T

TR - Type Rating
TRE - Type Rating Examiner
TRI - Type Rating Instructor
TRTO - Type Rating Training Organisation

V

VFR - Visual Flight Rules ("good" weather operations rules)
VJAR-FCL - Verordnung JAR-FCL (JAR-FCL transformed to Swiss Law)