The affected device was examined by the dräger service on site.The heater rh600 is attached to the traverse of the pp 8000 with four screws.The screws are secured with loctite (screw locking adhesive) and the mechanical fastening of the heater is checked twice a year during the inspection.All four mounting screws were still present on the device.The threads of the screws showed no damage and a test has shown that the screws were still fully functional.Since no damage was detectable, a strong mechanical load can be excluded as a cause.Furthermore, all four screws must have loosened simultaneously because no single screw was damaged or bent.The investigation revealed no technical cause for the simultaneous loosening of all four mounting screws.No similar incidents were reported within the last 3 years.
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