Landing gear sockets should be checked regularly for those who fly off of grass and certainly after a hard landing. Using a bright light will help find a crack before it becomes rusty like this one.
In Case You Missed It
Got Threads?
What to do when you've stripped a spark plug hole or other threaded receptacle in your homebuilt (once the cursing has stopped)? We have ways...
Ask the DAR
Is replacing one panel with another considered a major modification? And what is a “significant” change to weight and balance?