The present invention relates to an endoscopic device (1) comprising a rigid hollow shaft (2) having a first end (2a) and a second end (2b), a scraping device (3) provided at the first end (2a) of the rigid shaft (2), an image transmission device (5) transmitting image signals from the first end (2a) of the rigid shaft (2), a lighting device (6) positioned to illuminate an area next to the first end (2a) of the rigid shaft (2) and a suction device (7) having a suction line (20), which is directly or indirectly connectable to the second end (2b) of the rigid shaft (2) in order to suck material scraped by the scraping device (3). Moreover, the present invention relates to a method for analyzing material present on an outer surface of a turbine component arranged within a turbine housing (102) having at least one manhole (106) and/or at least one inspection port (105) using such endoscopic device (1).
