Flight Data Logging

NOTICE

Some aircraft installations may not provide all aircraft/engine data capable of being logged by the system.

NOTICE

Past flights cannot be viewed directly on Garmin Pilot and need to be pushed to flyGarmin.com® to access them.

The Flight Data Logging feature automatically stores critical flight and engine data which includes a default list (approximately 60 parameters). Approximately 25 flight hours are stored to a CMC folder in internal memory.

The logged data is written to the logging folder once each second while the GDU™ is powered on. When the allocated space is fully utilized, the oldest data will be overwritten. This data can then be manually exported when desired to a USB storage device using the USB port on the bezel of the AXIS™ flight display or it can be uploaded to a PED using internal Wi-Fi or bluetooth. Once the data has been transferred to Garmin Pilot, the application can transfer the flight log to the pilot’s flyGarmin.com® account for archiving and analysis once the mobile device connects to the Internet.

A number of third party tools are currently available for viewing/graphing these flight data logging files. For example, one tool is capable of directly importing these files into an aircraft specific flight log book. Any flight file in the logbook can be selected for viewing with the engine and flight data superimposed over 2D and 3D earth maps. Flights can be re-flown in 3D using the detailed data available. The data recorded by the Flight Data Logging feature is separate from data recorded by the Central Maintenance Computer (CMC).

All flight data logged on a specific date is stored in a file named in a format which includes the date, time, and nearest airport identifier. The file is created automatically each time the system is powered on. The .csv file may be viewed with Microsoft Excel or other spreadsheet applications.

The following is a list of data parameters the system is capable of logging:

  • Date (YYYY-MM-DD)
  • Time (Local)
  • UTC Offset (HH:MM)
  • Active Waypoint Identifier
  • Latitude (deg)
  • Longitude (deg)
  • Indicated Baro-altitude (feet)
  • Selected Baro-pressure setting (in/HG)
  • GPS altitude (MSL)
  • OAT (degrees C)
  • Indicated airspeed (kts)
  • Ground Speed (kts)
  • Vertical speed (fpm)
  • Attitude Pitch Angle (deg)
  • Attitude Roll Angle (deg)
  • Lateral and Vertical G Force (g)
  • Heading (degrees)
  • Aircraft Weight (lbs)
  • Track (degrees)
  • Fuel Qty L/C/R (lbs)
  • Fuel Flow eng. 1/2 (PPH)
  • Manifold Pressure eng. 1/2 (in/HG)
  • RPM eng. 1/2
  • Torque eng. 1/2 (ft-lbs)
  • RPM % Generator Turbine eng. 1/2
  • ITT eng. 1/2 (deg. C)
  • GPS altitude (WGS84)
  • True Airspeed (kts)
  • HSI source (NAV1/NAV2/GPS)
  • Selected course (deg)
  • Nav1/Nav2 frequency (MHz)
  • Com1/Com2 frequency (MHz)
  • Horizontal/Vertical CDI
  • Wind Speed (kts)
  • Wind Direction (deg)
  • Distance to next waypoint (NM)
  • Bearing to next waypoint (deg)
  • Magnetic variation (deg)
  • Autopilot On/Off
  • Autopilot roll/pitch mode
  • Autopilot roll/pitch command
  • GPS vertical speed (fpm)
  • GPS fix
  • GPS horizontal alert limit
  • GPS vertical alert limit
  • WAAS GPS horizontal protection level (1/2)
  • WAAS GPS vertical protection level (1/2)
  • GPS horizontal protection level (1/2)
  • GPS vertical protection level (1/2)
  • Position Fix Mode

The file containing the recorded data will appear in the format shown in the following figure. This file can be imported into most computer spreadsheet applications.

304: Flight Data Log File Format


190-03123-21 Rev A
July 2026