Questione giuridica chiave
Whether a substantial change in circumstances justified revision of the disability pension under Art. 17 ATSG.
Decisione estratta
The revision prerequisites were met because the insured person's status and household capacity had materially changed.
Motivazione estratta
The court accepted the household assessment and expert evidence showing a reduced hypothetical employment rate and a markedly lower impairment in household tasks compared with the original decision.