Glossary of Terminology

AC, A/C = Air Conditioning

ADs = Airworthiness Directives (Maintenance or Modification ordered by FAA)

ADF = Automatic Direction Finder

AFIS = Airborne Flight Information System

AI = Attitude Indicator

AP = Autopilot

Annual = Mandatory inspection of airframe and power plant that occurs every 12 months

A & P = Airframe and Powerplant

AP/FD = Autopilot/Flight Director

Aux Fuel = Auxiliary Fuel Tanks

Boots = Inflatable device on leading edge of wing and tail used to remove ice

CAMP = Computerized Aircraft Maintenance Program

CHT = Cylinder Head Temperature

COM = Communication Radio

Conventional Gear = Two main wheels with one tail wheel

C/R = Counter-rotating propellers

Cycles = Turbine engine cycle begins with engine start up, continues through full-power and ends with shutdown

DF = Direction Finder

DG = Direction Gyro

DME = Distance Measuring Equipment

EFIS = Electronic Flight Instrument System

EGT = Exhaust Gas Temperature Indicator

ENC = Encoder

FD = Flight Director

De-ice = Complete de-ice equipment installed on wings, tail, prop, and windshield

Full De-Ice = Complete de-ice/anti-ice equipment installed on wings, tail, props, and windshield

Full Panel = All gyros necessary for instrument flight

FWF = Firewall Forward (referencing overhaul)

GNS = Global Navigation System

Gold Crown = A set avionics package by King Radio Corp

GPS = Global Positioning System

GS = Glide Slope

HF = High Frequency Radio Equipment

Hot Prop = De-ice equipped propeller

HP = Horsepower

HSI = Horizontal Situation Indicator

IFR = Instrument Flight Rules

ILS = Instrument Landing System

IRAN = Inspection Repair As Necessary

K-Ice = FAA certified for flight into icing conditions

Known Ice, Known Icing = FAA certified for flight into icing conditions

LE = Left Engine

LOC = Localizer Receiver and Indicator

Loran = Long Range Navigation

LR Fuel = Long Range Fuel

LRT = Long Range Fuel Tanks

Microline = A set avionics package by Collins Radio Corp

Mid-Time = The middle third of recommended engine TBO

MLS = Microwave Landing System

MSP = Maintenance Service Program

NAV = Navigation Radio

Nav/Com = Navigation & Communication Radios

NDH = No Damage History

OXY = Oxygen system for passengers and crew

PBH = Power by the hour maintenance program

P&I = Paint and Interior

PMA = Parts Manufacturer Approval

P.O.R. = Price On Request

Proline = A set avionics package by Collins Radio Corp

RDF = Radio Direction Finder

RDR / Radar = On-board weather radar

RE = Right Engine

RG = Retractable Landing Gear

RMI = Radio Magnetic Indicator

RNAV = Area Navigation Device

SBs = Service Bulletin (Maintenance or modification ordered by the Manufacturer)

SCMOH = Since Chrome Major Overhaul

SCORE = Since Core Inspection (Turbine engine reference)

SFRM = Since Factory Remanufactured (reference to engines)

SFRMN = Since Factory Remanufactured (reference to engines)

SHOT = Since Hot Section Inspection (Turbine engine reference)

SHP = Shaft Horsepower (Turbine engine reference)

SHSI = Since Hot Section Inspection (Turbine engine reference)

Silver Crown = A set avionics package by King Radio Corp

Slaved Compass = North-seeking gyro-stabilized compass system

SMPI = Since Major Periodic Inspection (Turbine engine reference)

SMOH = Since Major Overhaul (engine time reference)

S/N = Serial Number

SOH = Since Overhaul

SPOH = Since Prop Overhaul (prop time reference)

STC = Supplemental Type Certificate

STOL = Short Takeoff and Landing Ability

STOP = Since Top Overhaul (reference to engines)

TBO = Time Between Overhaul

TCAS = Traffic Alert & Collision System

3LMB = Three Light Marker Beacon

Tri Gear = Tricycle style landing gear with nose wheel

TRs = Thrust Reversers

TT = Total Time (airframe reference)

TTAE = Total Time Airframe and Engine(s)

TTA&E = Total Time Airframe and Engine(s)

TTAF = Total Time Airframe

TTSN = Total Time Since New (airframe time reference)

Turboprop = A turbine engine driven propeller aircraft

TXP = Transponder

UHF = Ultra High Frequency

VFR = Visual Flight Rules

VHF = Very High Frequency

VLF = Very Low Frequency

VOR = Visual Omni Range (navigation radio)

Wet Wings = Method for containing fuel in the wings without using rubber fuel cells

XPDR = Transponder