Key legal question
Whether the conditions for revision of the half disability pension were met under Art. 17 ATSG and Art. 87 IVV.
Extracted holding
No material change in the factual circumstances was proven; the lower court relied on a different assessment of an essentially unchanged condition.
Extracted reasoning
The medical evidence did not show a relevant improvement in health or work capacity; at most it reflected a different appraisal. The insured's employment situation had in fact worsened after losing his 50% job.