Garmin GPS 400 Pilot's Manual & Reference page 230

APPENDIX A
DATA CARD USE
To remove the NavData or Terrain data card
(Figure A-2):
1) Gently press on the tab—using a slight upward
motion—at the front center of the data card.
This partially deploys the swing arm handle.
2) Rotate the swing arm handle upward (and
outward) until it locks into place, perpendicular
to the face of the GPS 400 unit.
3) Grasp the top and bottom surfaces of the
swing arm handle between your thumb and
forefinger, and pull directly away from the face
of the GPS 400 unit to remove the data card.
A-2
GPS 400 Pilot's Guide and Reference 190-00140-60 Rev. H