G / A GO AROUND
G / S GLIDE SLOPE
G / S GROUND SPEED
G GAIN
G GREEN
GA GO AROUND
GAL GALLON
GB GREAT BRITAIN
GBX GEARBOX
GCA GROUND CONTROLLED APPROACH
GCU GENERATOR CONTROL UNIT
GE GENERAL ELECTRIC
GEM GROUND BASED ENGINE MONITORING
GEN GENERATOR
GFRP GLASS FIBER REINFORCED PLASTIC
GIC GENERAL INSTRUCTION CARDS
GLA GENERATOR LOAD APU
GLC GENERATOR LINE CONTACTOR
GLE GENERATOR LOAD ENGINE
GLR GENERATOR LINE RELAY
GLS GLIDE SLOPE
GMT GREENWICH MEAN TIME
GND GROUND
GPCU GROUND POWER CONTROL UNIT
GPS GLOBAL POSITIONING SYSTEM (NAVSTAR)
GPWC GROUND PROXIMITY WARNING COMPUTER
GPWS GROUND PROXIMITY WARNING SYSTEM
GRD GROUND
GRND GROUND
GRP GEOGRAPHIC REFERENCE POINT
GRU GROUND REFRIGERATION UNIT
GRVTY GRAVITY
GS GLIDE SLOPE
GS GROUND SPEED
GTCP GAS TURBINE ENGINE COMPRESSOR POWER
GW GROSS WEIGHT
H HOTEL
H HEIGHT
H HOT
H HOUR
HARDOVER UNDESIRED SUDDEN MOVEMENT OF A/C BY FAULTY A/P SIGNAL
HC HARNESS AND CONNECTOR
HC HARNESS CABLE
HCF HEIGHT CYCLE FATIGUE
HCU HYDRAULIC CONTROL UNIT
HDG / S HEADING SELECTED
HDG HEADING
HDL HANDLE
HF HIGH FREQUENCY
HI HIGH
HL HIGHLIGHTS
HLD HOLD
HLDG HOLDING
HLTY HEALTHY
HMU HYDRO MECHANICAL UNIT
HOLD HOLDING
HORI HORIZON
HOT HIGH OIL TEMPERATURE
Aircraft Systems - Abbreviations and Acronyms 31

HP HIGH PRESSURE
HP HORSEPOWER
HPC HIGH PRESSURE COMPRESSOR
HPCR HIGH PRESSURE COMPRESSOR ROTOR
HPSOV HIGH PRESSURE SHUTOFF VALVE
HPT HIGH PRESSURE TURBINE
HPTACC HIGH PRESSURE TURBINE ACTIVE CLEARANCE CONTROL
HPTACCS HIGH PRESSURE TURBINE ACTIVE CLEARANCE CONTROL SYSTEM
HPTC HIGH PRESSURE TURBINE CLEARANCE
HPTCC HIGH PRESSURE TURBINE (ACTIVE) CLEARANCE CONTROL
HPTCCV HIGH PRESSURE TURBINE CLEARANCE CONTROL VALVE
HPTR HIGH PRESSURE TURBINE ROTOR
HPV HIGH PRESSURE VALVE
HSI HORIZONTAL SITUATION INDICATOR
HSMU HYDRAULIC SYSTEM MONITORING UNIT
HUD HEAD UP DISPLAY
HUDC HEAD UP DISPLAY COMPUTER
HV HIGH VOLTAGE
HVPS HIGH VOLTAGE POWER SUPPLY
HYD HYDRAULIC
I INDIA
I / C INSPECTION / CHECK
I / F INPUT PROCESSING & FAULT LOGIC
I / O INPUT / OUTPUT
I / P INPUT
I / P INTERCEPT POINT
I / P INTERCEPT PROFILE
IAE INTERNATIONAL AERO ENGINE: JAEC, ROLLS ROYCE, PRATT & WHIUNEY, MTU, FIAT AVIO
IAF INITIAL APPROACH FIX
IAS INDICATED AIR SPEED
IATA INTERNATIONAL AIR TRANSPORT ASSOCIATION
ICAO INTERNATIONAL CIVIL AVIATION ORGANIZATION
ID IDENTIFICATION
IDENT IDENTIFICATION, IDENTIFIER
IDENT SPECIAL IDENTIFICATION FOR ATC