The sooner the AAIU publish something about this the better. The SAR (and wider aviation) community need to know how a modern, fully-serviceable helicopter complete with a highly experienced crew ended up at the bottom of the sea. The fact that the rearcrew are still missing is not only heartbreaking for the families but something from which lessons need to be learned quickly. My gut feeling is that this wasn't straightforward human error but a systemic failure with multiple contributory factors (as is often the case).