Hi I was on a hand held Movi job at a hospital a couple of days ago and the DP had a phantom to do some B roll of the exterior of the hospital trough out the day he did several successful shots of the outside of the building on the last shot of the day he attempted a fairly simple shot above the hospital helipad the shot was hover over the pad tilt the camera straight down and land what ended up happening was he took off normally, copter got to a stable hover assisted by GPS, when he engage the lever on the back of his phantom radio for tilting the camera the copter suddenly flip 90 degrees and crash straight down it did not make any since, the helipad is an all metal structure with a layer of cement could that much metal create conditions for a copter to behave like this?
Yes it could. In addition if there were any communications or other electronic/electrical items on the roof likely that EMI or simple loss of GPS. Or that combined with loss of signal for some reason. And there is always the chance of pilot error. While looking for the tilt lever he accidentally moved one of the other controls inadvertently. Been there and done that but not with fatal results.
That sounds scary. There's also the possibility that the Phantom's gimbal had something snagged or wired wrong and that caused a problem. As we've seen hundreds of times, GPS is a twitchy thing at best, and relying on it to maintain perfect orientation while flying is a risk. And like Gary pointed out, there are likely big radios up on the roof, and any one of them could cause what you described. But it could also have been as simple as a bad battery, too. Was the Phantom a total loss? Or was it recoverable? And to bring this back on topic, this is 100% applicable to any copter in those situations. The GPS in a Phantom is not that different than a MK, WKM or A2. My guess is any of those GPS's might be at risk in that situation.
Apparently he crack the phantom case broke a prop and bend the gimbal support apparently th copter is still working I suggested to send it to DJI he send me the crash video https://vimeo.com/zipinmedia/review/119469081/d20824ee1f