Not a tandem. It was an instructor and a student from Iceland. Both had AAD's. no one saw them after leaving the airplane. No report about any canopies out, but there was a low scattered layer of clouds that obstructed the area were they were found.
Any word on if either had deployed main or reserve? Where were their main PCs and their handles? Did either AAD activate? Statistically it's got to be damn near impossible for two AADs to not fire on the same jump.
Statistically it's got to be damn near impossible for two AADs to not fire on the same jump.
In reply to:
Not that it has anything to do with this incident ~
But that's not at all true, IF some barometric anomaly occurred...there's a possibility nobody's AAD was working right.
Just like when everyone's AAD fires at the same time in an aircraft...
I think that's a bit different. Inside the aircraft, a condition has been met in the past (presumably) replicating freefall speeds and the activation altitude and thus causing AAD's to fire (2 if I'm not mistaken - not "everyone's").
I don't know of any anomaly during freefall that would cause 2 AAD's to fail on the same jump. I suppose there could have been some sort of human error during a manual field elevation offset adjustment (on BOTH units), but ya gotta wonder why they would have been doing that.
More likely scenario: either the AAD's were turned off, or the student's AAD failed and the instructor wasn't wearing one.
Condolences to the jumpers' families and everyone at the Z.
For an AAD malfunction we need an atmospheric pressure drop from 760 to 734 mmHg or something around it. If the landing spot is higher than the starting point, this difference can be even less. It is not an impossible situation IMO.