Here's basically what happened:

The team was climbing as 3. They climbed pitches 3 and 4 separately but decided to link the hauls in one shot. Matt was at the top of pitch 4, James and Perry were at the top of 3, and the bags were hanging on the haul line near the top of pitch 2. Matt had finished pitch 4 and fixed the haul line onto a pro traxion and backed it up. James was to jug the haul line while perry cleaned pitch 4 because the rope was in reach of the 3rd belay, albeit weighted already with the bags. I'm pretty sure they were using James' 9.5mm 70 m static line -- the same one we used on the Salathe a week before with no issues.

James somehow malfunctioned the attachment of his jumars to the taught haul line, but after he had released his daisy chains from the anchor. He began sliding down the haul line until one of his jumars finally engaged some 30 feet later or so. There was a sheath piling found on the scene, so we know he broke the sheath first, initiated a sheath fall, and finally the core broke after the sheath fall ended and shock-loaded the system. He and the bags fell 300 feet to the base. Other details are not known yet. We do not know how James failed to attach the ascenders properly, but we do know that he is used to using the new BD ascenders and for just that pitch he used the petzl jumars.

Please folks, understand that jumaring taught haul lines is not safe and should always be avoided. I had a close call on the Nose in 2003 when my partner jumared a taght haul line and we broke a pro-traxion in half during the lower out. It cut the sheath, and the backup knot I tied saved his life. I only use pro-traxions these days with a full strength swivel and a big locker in the bottom hole.

When climbing as 3, the second should always jumar the slacked haul line first so he can be backed up with knots or a gri gri, then the bags can be lowered out. In their case, it was not possible because they linked the hauls. If you link hauls like that, the second should clean the upper pitch first, then the third should jumar the lead line after it's been cleaned rather than grabbing the taught haul line and comitting to it. Plus, linking hauls like that is usually not possible anwyay because the haul line hardly ever hangs within reach of the intermediate belay. And also, saving time by linking those hauls is counterproductive when you consider that to get the other two up safely, you'd need to wait until the upper pitch is cleaned before the third can come up.

If a taught haul line is going over a lip, you cannot pass it with 2 jumars and because you cannot be backed up with a gri gri or knots, you are only on one jumar during the maneuver. It's also too much strain for the hauling device and is more likely to chop ropes going over sharp edges. It doesn't save time to do it this way either. Just avoid it no matter what. I've climbed many walls with 3 people and always jug an unweighted haul line. The one time we did otherwise (on the Nose) my partner almost died.

--Pete