I was going to wait until FreeFly had an opportunity to review this incident but I submitted the incident and requested an RMA a week ago and was told there because of the Alta 8 grounding they could give me no estimate on when I will receive an RMA to get the unit in for repair. The Incident We were flying the Alta with the MOVI m5 carrying a Sony a7s ii with a Canon 24-105 L lens and an Amimon Connex video transmitter. Batteries were a pair from FreeFly - 10,000 mah. A pretty light load using our normal, teal dampeners. This is the same configuration we've used countless times. We started the day with a compass calibration and normal checklists and systems checks with no issues. We flew the first set of batteries, no problem - had a nice flight for just over 8 minutes with little to no wind. We swapped the batteries, completed our check-lists and start up procedures, again with all systems go as normal. The pilot launched the Alta in manual, as normal, hovered for a few, then switched into GPS mode. The aircraft banked instantly, hard at about 20 degrees from the nose in an easterly direction and towards the ground (incidentally NOT holding the altitude as expected). The pilot tried to correct but it was only seconds before it hit the grass. This was an area we had flown numerous times previously with no issues and nothing we expected to cause any interference. One boom has significant damage to the buckle with some props damaged. A couple pieces of carbon fiber on the m5 are damaged and will need to be replaced and one landing gear leg snapped. Camera was not damaged, so all-in-all we were pretty lucky. I suspect total damage is probably to about 5-8 basic parts. I looked through the data and tried to decipher but nothing jumped out at me (no LOS or loss in GPS, etc). I'll attach the data if any good samaritans are willing to have a look. I certainly understand FreeFly is a smaller company and quite busy with this grounding issue they're having but I sure hope some repair resources free up for us old customers somewhat soon.