Have been shown the technicalities of the incident by a Eurocopter mech. Unlike most helicopters such as the AS350, the Bubble does not join to the floor on the EC-120. Where as the AS350 chin bubble is sealed from the bubble to the floor to prevent objects entering the area under the floor, the EC120's does not. FOD phones are therefore able to slide forward (what sort of attitudes would be required?) and go over the front lip of the floor. It then falls to the bottom of the bubble which is curved. The curve slides the FOD rearward and under the floor where it can access your tail rotor controls, stuff your day, and give you a real time experience from which to argue about yaw control malfunctions on Pprune.
No mod out yet. We are temporarily fitting a bit of foam rubber in the gap to stop those pesky phones, etc.
Reminds me of a crew that came back complaining that the engine would suddenly not make anywhere near spec power - as discovered on a hot/high departure.
Collective was hitting upstop well before engine temp/N1/Tq or bleed limits reached.
Upstop was found to be copilot's camera hanging from his seat!!!
PS: whatsarunaway no response recieved from you as yet, but thanks for the offer.