- Cutter drum arrived onsite unloaded and inspected.
- Visually inspected entry and exit points and fittings.
- Drained Vanes by removing pressure plugs
- Internal borescope inspection carried out.
- Connected required fittings & hoses and began clean water process (pumping clean water through cutter drum circuits)
- Check for leaks, contain & repair.
- Apply chemical and begin flushing process.
- On completion of flushing process neutralise chemical and place into 20ltr drums ready for disposal and flush drum with clean soapy water.
- Remove and replace spray plugs starting from top ring working down each vane checking each spray port is clear.
- Flush cutter drum with clean water and ensure all chemical is removed.
- Internal borescope inspection carried out.
- Fill drum with anti-corrosive fluid.
- All contaminated chemical removed, and area left clean and tidy.
- Load cutter drums onto truck.
After initial inspection of cutter drums, we found large deposits of contamination in all vanes of both cutter drums as you can see from the photos above once again all vanes were full of contamination. Also, there was no evidence of any anti-corrosive in either drum which is essential to prevent re-contamination before installation.
Borescope inspection was carried out on all vanes on both drums and comparable results were found as per the before and after in this report.
All spray ports in tool holders on both drums now have full clearance.
Borescope Inspection – BEFORE 
Borescope Inspection – AFTER 
Debis collected from flush 
Debris collected from flush
