OK so I crashed my Mavic into a tree four days ago.  It fell from about 20 feet onto its back.  I put the battery back in and checked for any visible damage and have since flown it five more times.  I have not encountered any issues flying it around put when I RTH it will speed up to 12 MPH and brake to a stop and speed back up and brake to a stop the entire time it is RTH.  Dows anyone know what this might be?

Sorry to hear about your crash, it seems that some internal modules were damaged when crashing which is not visible.
To ensure safety and performance, we do suggest you to send it in for evaluation by our engineers. You can submit a case online here: https://repair.dji.com/en/SelfRepair/Area

DJI Natalia Posted at 2017-5-10 00:49
Sorry to hear about your crash, it seems that some internal modules were damaged when crashing which is not visible.
To ensure safety and performance, we do suggest you to send it in for evaluation by our engineers. You can submit a case online here: https://repair.dji.com/en/SelfRepair/Area

Do you have another link?  That one does not work.

SuperNewb Posted at 2017-5-10 17:58
Do you have another link?  That one does not work.

I double checked the link, there is no issue, could you please try again with another web browser: https://repair.dji.com/en/SelfRepair/Area ? Thanks.