NDT-confirmed surface-breaking crack, grown from 38 mm to 54 mm length since baseline inspection. Engineering critical assessment per BS 7910 indicates the defect now exceeds acceptance criteria for continued operation without intervention.
Location: B2-C2 K-joint, brace-side weld toe (-12.4, 8.1, -42.7)
Recommended action: Immediate engineering review; impose operational restriction or temporary clamp; grind-out and re-weld at earliest accessible window — do not defer to next planned shutdown.
UT thickness mapping confirms general corrosion accelerated to 18–21% wall-thickness loss (up from 11–13% at baseline) over the splash-zone band. Now above NORSOK N-005 severe-degradation threshold.
Location: Leg B2, splash zone (-10.2, 8.1, -18.5)
Recommended action: Remaining-life reassessment against design fatigue; TSA coating retrofit or splash-zone cladding at the next accessible campaign; shorten re-inspection interval.
Sacrificial anode array now 94% depleted (7 of 8 anodes fully consumed). Cathodic protection capacity critically below design margin per DNV-RP-B401 — accelerated free-corrosion risk on the lower jacket section.
Location: Leg B2 lower section anode array (-12.4, 8.1, -62)
Recommended action: Anode retrofit is now urgent — clamp-on or pile-driven supplementary anodes within 30 days; potential survey immediately.
Localized pitting, max depth 1.7 mm across a 0.3 m² area — effectively stable since baseline. Below DNV-RP-B401 immediate action threshold.
Location: Conductor guide C-3 (-8.7, 4.2, -38)
Recommended action: Continue monitoring at next inspection; no action required this cycle.
Newly detected protective-coating breakdown over a ~2.1 m² area, exposing bare steel. Not present at the baseline inspection — consistent with mechanical damage or coating-system end-of-life per NORSOK M-501.
Location: Leg B2, mid-section below splash zone (-11, 8.1, -28)
Recommended action: Spot-blast and re-coat at next accessible campaign; monitor for corrosion initiation on exposed steel in the interim.