Questione giuridica chiave
Whether the half disability pension could be revised and discontinued under Art. 17 ATSG.
Decisione estratta
The pension could not be revised away because the medical reports showed only a different assessment of an essentially unchanged condition, not a relevant change in health or earning capacity.
Motivazione estratta
Art. 17 ATSG requires a material change in the factual circumstances. The later psychiatric expert disagreed with the earlier assessment and diagnostic weight, but did not establish a real deterioration or improvement since the pension award.