Submission – NE WBT 5P FMECA

Written by Claude Haiku 4.5 from the extracted text on 27 Feb 2026. It can miss or misread redacted and scanned pages. Check the source before relying on it.

This document is a technical submission from the Northern Endeavour FPSO operator presenting a Failure Modes Effects and Criticality Analysis (FMECA) methodology for managing water ballast tank (WBT) integrity. The analysis covers 198 anomalies identified during Special Survey 4 inspections conducted in April 2017 across multiple WBT compartments. Key findings indicate localized corrosion from coating breakdown affecting primarily the upper tank sections (90% of anomalies), with no fatigue or welding defects detected and minimal generalized corrosion (0.6% average diminution). The operator proposes applying this qualitative FMECA approach, supplemented by quantitative stress and buckling analysis where necessary, to systematically assess all anomalies and implement appropriate mitigation measures. The methodology was intended for application across all water ballast tanks on the FPSO.