I hate to see the word seizure used to describe engine failures.
Engines don't seize under Ram air conditions, they do however exhibit a rate of change in RPM over a few seconds but not to zero.
The safety related concept with FADECS and engine failure conditions has several parameters it can sense and compensate for.
e.g. Differences in N1 N2 against a standard or the other engine, and/or diffrences in EPR between engines against selected power conditions.
Flameout is also not a useful terms other than what N1, N2 and/or EPR are present.
Note the above comments apply to propulsive forces and not necessarily to damage conditions within the engine like vibration or excessive temperature. It all depends on what this question is really all about