Substitute Engine Parts Cause of Fire on Board UK Survey Vessel, Report Says

Why It Matters

The incident highlights the safety and operational risks of using non‑approved parts in critical marine equipment, prompting tighter oversight and compliance expectations across the offshore industry.

Key Takeaways

• Substitute bearings installed in 2019 caused premature wear and fire
• OEM parts required for extended service intervals; substitutes voided warranties
• Lack of oversight let non‑approved components go undetected
• Anchoring system relied on electrical power, exposing emergency vulnerability
• Gardline rebuilt engine with OEM parts, improving safety compliance

Pulse Analysis

The fire aboard the UK‑flagged survey vessel Kommandor Susan underscores how a single component can cascade into a full‑scale emergency at sea. The Marine Accident Investigation Branch traced the incident to substitute bearings installed during a 2019 overhaul, which lacked the material integrity of original equipment manufacturer (OEM) parts. Because the vessel’s extended service intervals were calibrated for OEM components, the weaker bearings failed prematurely, igniting the diesel generator and knocking out power. This case illustrates that cost‑saving shortcuts in critical machinery can jeopardize vessel safety and operational continuity.

Equally troubling was the breakdown in oversight. Hays Ships Limited, the former owner, assumed OEM parts were used and failed to verify the overhaul documentation, allowing non‑approved components to slip through to Gardline Shipping. The incident highlights a systemic gap in the maritime supply chain, where third‑party refurbishments often escape rigorous audit trails. Regulators may now push for tighter certification requirements, mandatory traceability of parts, and stricter reporting obligations for vessel owners during ownership transfers. Strengthening these controls can prevent similar latent defects from remaining hidden until a failure occurs.

For operators, the lesson is clear: adherence to OEM specifications is not optional when extended maintenance schedules are in place. Gardline’s decision to rebuild the affected engine and replace all generators with OEM parts restores compliance and reduces future risk, but it also incurs significant capital expense. Industry stakeholders are likely to reassess risk‑based maintenance strategies, invest in digital parts‑tracking platforms, and revise emergency procedures that do not depend on electrical power for critical systems such as anchoring. Ultimately, the Kommandor Susan incident may accelerate a shift toward greater transparency and resilience in offshore vessel operations.