It seems that nearly half of the posts to this forum start off with "lost my Phantom" or "Phantom crashed - help!". With 50 successful and uneventful flights since purchasing a P3A last Jan., I didn't think that was going to happen to me - until it did. Yesterday evening, I sent the Phantom straight up from my house for some photos. At 900', I saw the screen image go wonky, and then watched helplessly as the craft tumbled from the sky into a 600' canyon next to the house (for those who wish to freak about the 900', I'm in the middle of nowhere with no nearby aviation). Climbed down the canyon and was able to locate the craft by it's last dying beeps. Housing and battery shattered, gimbal and camera here & there, Marco Polo ejected & lost (hadn't turned it on, since I was only going straight up). Checked flight logs - all normal until just after fall began, then an endless series of speed & compass errors. As far as what could have caused this, one prop (DJI carbon fiber) was completely missing - possible catastrophic failure? I had just tightened them before take off and had made no sudden or braking maneuvers - just straight up. This was also the first flight after installing the v1.9.60 firmware. DJI Go App showed clear with safe to fly. All I know at this time is that I'm on the fence as far as replacement - it's a pretty fair chunk of cash to risk to what seems to be a litany of minutia just waiting to go wrong.