Hello after a bad windy landing the motors blocked for 5 secs while spining in the sand.I cleaned everything and tested it.Everything seems ok.What I have to check now? Thanks.

If you cleaned everything you should be fine.

If if was only blocked for that short of a time the ESC's will be ok.

Thanks for your reply,yes there is no sign of dust now.I tested it everything look ok,I hope!

After each flight just check the motors by feel to see that they still spin freely and have the same friction as each other. Make sure none of the, are getting hot. That's just a safety check and if all is well keep on keeping on. Enjoy flying and have a nice day.