Question 1

While working in the engine room, a high-pressure fuel or hydraulic pipe develops a small pinhole leak, releasing a fine spray that is not immediately obvious. Why is this considered a serious hazard, even though the leak itself seems minor?

Accepted Answer

A fine, high-pressure spray of fuel or hydraulic oil can be invisible or nearly invisible, can penetrate skin causing serious injury (fluid injection injury) if it contacts a hand or other body part, and if it contacts a hot surface (such as exhaust piping) can ignite, creating a fire hazard that is harder to detect and fight than a pooling leak because the source may not be obvious High-pressure fluid injection injuries are a recognised and serious hazard in engine rooms — a pinhole leak in a fuel injection line or hydraulic system can produce a jet fine enough to penetrate skin with little visible external damage at first, but causing severe internal tissue damage requiring urgent medical treatment. Additionally, fine atomised fuel sprayed onto a hot exhaust manifold or turbocharger casing is a well-documented cause of engine room fires, which is why any unusual spray, mist, or smell of fuel/hydraulic oil near hot surfaces should be reported and investigated immediately, not left for later.

Question 2

You're draining a thermal oil system that was running normally a short time ago. Before opening the drain point, what should you confirm?

Accepted Answer

That the system has cooled and depressurised, and you are positioned clear of the drain point's discharge path On the dredger MV Amazone, two crew members draining a thermal oil system after months of contamination were sprayed with hot oil, suffering severe burns. The investigation found company procedures lacked clear instructions for safe drainage — confirming the system has cooled and depressurised, and standing clear of the discharge path, are essential before opening any drain point on a hot oil system.

Question 3

A thermal oil system has been contaminated and needs draining for cleaning. The written procedure tells you to open the drain valve but doesn't specify a cooling-down period or PPE. What should you do?

Accepted Answer

Treat the gap as a hazard in its own right: apply a suitable cooling/depressurising period and full PPE before proceeding, and raise the procedure gap with the Chief Engineer The FEBIMA investigation into the MV Amazone incident found that although the crew followed company procedures, those procedures lacked clear instructions for safely draining a thermal oil system. A procedure that's silent on cooling time and PPE for a hazardous task is a gap to be closed before the job starts — not a green light to skip those precautions.