TM 1-1510-225-10 B-6 EAROM Electronically   Alterable   Read   Only Memory EFIS Electronic Flight Instrument System EFWS Electronic Failure Warning System EGPWS Enhanced Ground Proximity Warning System EHSI Electronic Horizontal Situation Indicator ELEC Electric ELEV Elevation ELT Emergency Locator Transmitter EMERG Emergency ENG Engine ENRTE En Route ENVIR Environment EPE Estimated Position Error ESA Enroute Safe Altitude EST CROSSING Estimated Crossing Altitude ET Elapsed Time ETA Estimated Time Of Arrival ETA@ Estimated Time Of Arrival At Destination ETE Estimated Time En Route ETM Engine Trend Monitor ETMS Engine Trend Monitor System EXP  Expired EXT Extinguisher, External FAA Federal Aviation Administration FCU Fuel Control Unit FD Flight Director FH Frequency Hopping FHDG Free Heading FH-M Frequency Hopping-Master FL Flight Level FLIP Flight Information Publications FLT Flight FM Frequency Modulation FMS Flight Management System FOB Fuel On Board FPA Flight Path Angle FPL Flight Plan FPM Feet Per Minute FR From Waypoint FREQ Frequency FS Fuselage Station FSB Fasten Seat Belt FSS Flight Service Station FT Foot, Feet FT/MIN Feet Per Minute FT-LB Foot-Pounds G Gravity GA, G/A Go-Around GAL Gallons GCAS Ground Collision Avoidance System GEN Generator GLS Glideslope System GMAP Ground Mapping GMT Greenwich Mean Time GND Ground GOV Governor GPAAS Ground  Proximity  Altitude  Advisory System GPS Global Positioning System GPU Ground Power Unit GPWS Ground Proximity Warning System GRI Group Repetition Interval GS Glideslope GTOW Gross Takeoff Weight GYRO Gyroscope HC Home Cursor HDG Heading HDL Handle HDWND Headwind HF High Frequency Hg Mercury HP Holding Pattern