What are the diagnostic features of a failure caused by 'Centrifugal Lift-Off'?

Centrifugal lift-off is characterized by a ring that is found outside of its groove, often completely undamaged or with slight scoring on its OD (for external rings). Diagnostic features include: 1) The ring's free diameter $D_f$ is still within specification (indicating no plastic deformation during installation); 2) Scoring on the housing bore (where the expanded ring rubbed during high-speed rotation); 3) The failure occurred only at high RPMs. To prevent this, the engineer must verify the RPM limit using the centrifugal formula or switch to a 'Self-Locking' spiral ring where a tab mechanically locks the turns together.