Greetings fellow Spark Pilot, long time reader of this forum but until now I register. Yesterday I had my first major crash after 2 months of successful flying. 
I was flying over a river bed from a metal bailey bridge (bridge may be the cause of the interference?) I took it to about 80 meters from me (263 feet) getting beautiful footage and then it showed me the alert for "weak GPS signal" I never had that before, so I carefully started to bring it back to land, and while it was coming to me I tried to stop but it continued going by itself in the same direction it was coming from without me commanding it, I regained signal for a moment and quickly decided to go full throtle up to save it from some upcomming trees, but it was to late and it crashed against the trees, hit the floor and then stumbled to the actual river bed (ouch), I came down vertically from at least 50 meters (164 feet) to solid Rock... this little guy is sturdy!
I managed to go down to the river bed with a lot of difficulties ( very large rock walls ) but I was able to retrieve her, the damage was not very extensive for the massive fall that was, some minor scratches, 2 missing motor covers? and the frontal sensors glass was missing and the frame for it damaged.
To my surprise, the lil sparko flyes just fine after this, without the lens cover and the motor caps it flis as nothing happened. So my question is, can I replace this parts? If it flies normally should I be worried to fly it like this? Thanks it advance. I'll try to post some footage of the chrash and the flight log.

I was flying over a river bed from a metal bailey bridge (bridge may be the cause of the interference?) I took it to about 80 meters from me (263 feet) getting beautiful footage and then it showed me the alert for "weak GPS signal" I never had that before, so I carefully started to bring it back to land, and while it was coming to me I tried to stop but it continued going by itself in the same direction it was coming from without me commanding it, I regained signal for a moment and quickly decided to go full throtle up to save it from some upcomming trees, but it was to late and it crashed against the trees, hit the floor and then stumbled to the actual river bed (ouch), I came down vertically from at least 50 meters (164 feet) to solid Rock... this little guy is sturdy!
I managed to go down to the river bed with a lot of difficulties ( very large rock walls ) but I was able to retrieve her, the damage was not very extensive for the massive fall that was, some minor scratches, 2 missing motor covers? and the frontal sensors glass was missing and the frame for it damaged.
To my surprise, the lil sparko flyes just fine after this, without the lens cover and the motor caps it flis as nothing happened. So my question is, can I replace this parts? If it flies normally should I be worried to fly it like this? Thanks it advance. I'll try to post some footage of the chrash and the flight log.