GRT Avionics flight data log — export & score every landing

1) Turn on the USB Flight Data Logger — before you fly

A GRT EFIS has no internal flight memory. It records only to a USB stick, and only when its logger is switched on — so unlike most glass, this is a before-the-flight action. Miss it and the flight records nothing.

1. In the GRT setup menus, switch on the USB Flight Data Logger — some firmware labels it the Black Box feature — and set it to record.
2. Leave the record rate at its default (1 Hz) or faster. A slower rate skips seconds and blurs the touchdown.
3. Choose a per-boot file (e.g. GRT FDL ####.CSV) rather than the default single append file, so each flight lands in its own file.

2) Plug in a USB flash drive — at the rear port

GRT logs to a USB flash drive, not an SD card. The port is on the rear of the display — there is no slot on the front of the screen. Most installs route a panel-mount USB extension cable to a reachable spot, so you plug into the end of that cable wherever your builder mounted it.

1. Use a FAT-formatted USB flash drive. Most small drives already are — if yours won’t read, format it to FAT32.
2. Plug it into a rear USB port — or the panel-mount USB outlet if your install has one. (Which port your model uses is in Which GRT do you have? below.)
3. Leave it in and fly normally.

Need one? A 32 GB USB flash drive is in spec — FAT32, full-size USB-A. The Mini takes a Mini-USB drive (or GRT’s Mini extension cable) instead.

3) Pull the drive and upload it

Back on the ground, pull the USB drive out of the GRT (or off the panel-mount cable). On it you’ll find the GRT log:

1. Look for GRT Flight Data Logger.CSV, or per-boot files named GRT FDL ####.CSV / GRT FDL YYYYMMDD HHMMSS.CSV.
2. The default single file (GRT Flight Data Logger.CSV) appends every power-up, so it can hold several flights at once. The per-boot files keep them separate — either uploads fine.

Upload at landing.fyi →

Grab every GRT Flight Data Logger.CSV file from the USB drive and upload them all at once — landing.fyi scores each flight and quietly ignores any duplicates, so it's safe to select the lot.

Which GRT do you have?

Every modern GRT EFIS logs the same way — the USB Flight Data Logger writes a flat .csv to a USB stick, so the steps above are identical across the line. The only thing that differs is the rear USB port:

GRT flight data — FAQ