GND
Ground
GPCU
Ground Power Control Unit GPS
Global Positioning System GPU
Ground Power Unit
GPWC
Ground Proximity Warning Computer
GPWS
Ground Proximity Warning System GRP
Geographic Reference Point
GRU
Ground Refrigeration Unit GS
Ground Speed GSE
Ground Support Equipment GW
Gross Weight H
Hot (Electrical Point)
HCU
Hydraulic Control Unit
HDG
Heading
HEGS
Hydraulic Electrical Generating System HF
High Frequency HI High
HLAC
High Level Alternating Current Voltage
HLDC
High Level Direct Current Voltage
HMU
Hydromechanical Unit HP
High Pressure HPC
High Pressure Compressor HPT
High Pressure Turbine
HPTACC
High Pressure Turbine Active Clearance Control HS
High Speed HSI
Horizontal Situation Indicator
HSMU
Hydraulic System Monitoring Unit
HUDC
Head Up Display Computer
HYD
Hydraulic I/O
Input/Output I/P
Intercept Profile I/P
Input IAE
International Aero Engines IAS
Indicated Airspeed IBR
Integral Bladed Rotor ID
Inside Diameter
IDENT
Identification, Identifier, Identify IDG
Integrated Drive Generator
IDGS
Integrated Drive Generator System IGB
Inlet Gear Box IGN
Ignition IGV
Inlet Guide Vane ILS
Instrument Landing System (LOC and G/S)
IMM
Immediate INB
Inbound
INBD
Inboard
INCR
Increment IND
Indicator
INFO
Information
INHIB
Inhibition, Inhibit, Inhibited INIT
Initial(ization)
INOP
Inoperative INR
Inner INT
Interrupt
INTCP
Intercept
INTFC
Interface
INTL
Internal
INTRG