appears to have lost a pitchlink, shed a single blade first, then the massive TR imbalance then released the remaining blade, then the part of the TR gearbox sat proudly in the car park. Possibly. Maybe. The massive kinetic energy in this wide chorded 222 blades probably helped reduce the injuries to the crew, although conversely, may have added to the injuries on those watching.
https://hosting.photobucket.com/8a2027c5-4a9f-47ab-8b2c-3217e92f562c/7ac374a1-4e9d-4016-8de3-8841296faed4.jpg?width=1920&height=1080&fit=bounds
picture of Tail Rotor