Kernrechtsfrage
Whether the appellant was entitled to more than a quarter disability pension from 1 April 2010
Extrahierter Entscheid
She remained entitled to a three-quarter disability pension from 1 April 2010.
Extrahierte Begründung
No relevant change in circumstances occurred, so no revision ground under Art. 17 ATSG existed. The original 2004 pension award was not clearly erroneous within the meaning of Art. 53(2) ATSG; the medical assessment and income comparison then used were within the range of defensible assessment and could not later be replaced by a mere different view of fibromyalgia-related incapacity.