| ACAS | Airborne Collision Avoidance System |
| ACOL | Anti-collision light |
| ADC | Air data computer |
| ADELT | Automatic deployable Emergency Locator Transmitter |
| ADF | Automatic direction finder |
| AEO | All engines operating |
| AFCS | Automatic Flight Control System |
| AGL | Above ground level |
| AHRS | Attitude Heading Reference System |
| ALT | Altitude or Altitude hold |
| ALT.A | Altitude acquire |
| AMC | Aircraft Management Computer |
| APCP | Autopilot control panel |
| A.TRIM | Automatic trim system |
| ATT | Attitude or Long term attitude hold |
| BAT | Battery |
| BKUP | Backup SAS |
| BOT | Bottle |
| CRHT, CR.HT | Cruise height |
| DA | Decision Altitude |
| DEG, DEGR | Degraded |
| DG | Directional gyro |
| DH | Decision height |
| DISCH | Discharge |
| DISCON | Disconnected |
| DMAP | Digital Map System |
| DME | Distance measuring equipment |
| DSAS | Digital SAS |
| DST | Distance |
| DTD | Data Transfer Device |
| DTK | Desired Track |
| EFB | Electronic Flight Bag |
| ELT | Emergency Locator Transmitter |
| EMER | Emergency |
| EMS | Emergency Medical Services |
| EPU | External power unit |
| FADEC | Full Authority Digital Engine Control |
| FDS | Flight Display System |
| FLI | First limit indicator |
| FMS | Flight management system |
| FND | Flight and Navigation Display |
| FPA | Flight Path Angle |
| GA | Go Around |
| GEN | Generator |
| GPS | Global positioning system |
| GS | Ground speed |
| GTC | Ground trajectory control |
| GTC.H | Ground trajectory control with hover mode |
| GTN | GARMIN GTN 750 |
| HAT | Height Above Terrain |
| HDG | Heading |
| HEMS | Helicopter Emergency Medical Services |
| HIGE | Hover in ground effect |
| HISL | High Intensity Search Light |
| HMD | Helmet Mounted Display |
| HOGE | Hover out of ground effect |
| HTAWS | Helicopter Terrain Awareness and Warning System |
| IAS | Indicated airspeed |
| IBF | Inlet Barrier Filter |
| IESI | Integrated Electronic Standby Instrument/Indicator |
| IMA | Integrated Modular Avionics |
| LAVCS | Light Helicopter Active Vibration Control System |
| LDG | Landing (Landing Light) |
| LNAV | Lateral Navigation approach (nonprecision) |
| LNAV+V | Non–precision LNAV approach with vertical guidance |
| LNAV/VNAV | Lateral Navigation and Vertical Navigation approach |
| LOC | Localizer |
| LOW ALT | Low altitude |
| LP | Localizer Performance without vertical guidance |
| LP+V | Localizer Performance with advisory vertical guidance |
| LPV | Localizer Performance with vertical guidance |
| L/VNAV | Lateral Navigation and Vertical Navigation approach |
| LSK | Line select key |
| MFD | Multifunction display |
| MGB | Main gearbox |
| MISC | Miscellaneous |
| MSG | Message |
| MSTR | Master |
| MTOW | Maximum Takeoff weight |
| N1 | Gas generator speed |
| N2 | Power turbine speed |
| NAVD | Navigation display |
| OAT | Outside air temperature |
| OBS | Omni Bearing Selector |
| OEI | One engine inoperative |
| OGE | Out of ground effect |
| OVHT | Overheat |
| PAX | Passenger |
| pb | Push Button |
| QTY | Quantity |
| RA | Radar altitude |
| RNAV | Area Navigation |
| SAS | Stability augmentation system |
| SBAS | Satellite Based Augmentation System |
| SEMA | Smart electro-mechanical actuator |
| SL, S/L | Search Light |
| SK | Select Key or Soft Key |
| STBY | Standby |
| SUSP | Suspended |
| SVS | Synthetic Vision System |
| SYS, SYST | System |
| TAS | True airspeed |
| TGB | Tail gearbox |
| TOP | Takeoff power |
| TOT | Turbine outlet temperature |
| TRQ | Torque |
| TRK | Track |
| V.APP | Vertical approach |
| VENT | Ventilation |
| VMS | Vehicle Management System |
| VNE | Never-exceed speed |
| VNE power off | Maximum speed in autorotation |
| VOR | VHF omnidirectional radio ranging |
| VRS | Vortex Ring State |
| VS | Vertical speed |
| VTOSS | Takeoff safety speed |
| VY | Best rate-of-climb speed |
| XFER | Fuel transfer pump |