- Once the header was removed Tube Tech inspected the tubes, confirming 937mm long ferrules had clogged the tube bores. Broken ferrule sections had lodged in the 'U' bends of the heat exchanger, while others had folded back on themselves but remained adhered.
- Bottom half tubes were severely affected with 94 tubes completely blocked, effectively limiting the unit to 5% flow.
- Tube Tech used their SafeFlex system to safely drill the straight and then the tubes were then DarTTed around all hairpin bends to remove any remaining debris.