The same thing happened to TIGC, in 1982 at the NW Hutton. The spindle cracked at the 12 o' clock position and some fast and very wise decision making on the part of the crew, to put the machine back on the deck of the Balder, means that they are still here to talk about it!
The spindle design is similar on the Sikorsky/Aerospatiale fleet of that era, and helicopters from both manufacturers have suffered from a number of fatal consequences from failures in this area.
It will be very interesting to understand the origin of this particular failure.
Well done to the crew!