PROBLEM:
"FPL WPT LOCK – Flight plan waypoint is locked." appears on a Garmin GPS or MFD after updating the navigation database.
CAUSE:
Upon power-up, the system detects that a stored flight plan waypoint is locked. This occurs when a navigation database update eliminates an obsolete waypoint. The flight plan cannot find the specified waypoint and flags this message. This can also occur with user waypoints in a flight plan that is deleted.
Below is an excerpt from the Garmin G1000 Pilot's Guide for the Diamond DA40/40F (190-00592-03 Rev. A), APPENDIX A - G1000 SYSTEM MESSAGE ADVISORIES:
| Message Advisory | Comments |
| FPL WPT LOCK – Flight plan waypoint is locked. | Upon power-up, the G1000 system detects that a stored flight plan waypoint is locked. This occurs when an aviation database update eliminates an obsolete waypoint. The flight plan cannot find the specified waypoint and flags this message. This can also occur with user waypoints in a flight plan that is deleted. Remove the waypoint from the flight plan if it no longer exists in any database, OR update the waypoint name/identifier to reflect the new information. |
RESOLUTION:
Remove the waypoint from the flight plan if it no longer exists in any database, or update the waypoint name/identifier to reflect the new information.