Kernrechtsfrage
Whether the reduction of the ongoing invalidity pension to three quarters was lawful.
Extrahierter Entscheid
The reduction could not stand because the medical basis was incomplete and the decisive facts had not been sufficiently established.
Extrahierte Begründung
The prior assessment relied on outdated expert reports and brief medical-service opinions; given the time lapse, a new orthopaedic and psychiatric examination was necessary.