21 LMM V I S I O N ISSUE 19 | Q4 2024 INCIDENT REPORT II. Substandard Conditions: ●● Mooring winch responded slower before sending messenger line to tugboat ●● Electric Motor tripped (defective) ●● Loose cable in electrical starter panel (leading to burning of motor windings) III. Job Factors: ●● Inadequate inspection of cables’ tightness ●● Inadequate instructions for monitoring operational condition of FWD HPU Team Engagement & discussion topics ●● Describe potential safety hazards that you can identify during similar incidents ●● What steps are to be followed once you identify a machinery trip? ●● Why is important to timely inform C/O once you encounter similar related to mooring operations? Why is it important to follow this up? Incident Description Vessel was at anchorage preparing for mooring operation with an FSO at Escravos, Nigeria. After having her anchor heaved up and having made fast with aft tugboat, the FWD Mooring Team re-assembled at FWD mooring area. Vessel was planned to send a messenger line to tugboat being portside for connecting such with a buoy attached to the FSO chain and for this reason the Bosun started the relevant mooring winch. A few minutes later, Bosun observed that mooring winch was responding slower and, after checking, an alarm was noted in the starting panel located in Bosun Store. Immediately such was reported to C/O who proceeded into Bosun Store and observed that one electric motor of HPU was not running and had tripped. Such was reported at the same time both to the Master and Mooring Master who decided to abort the mooring operation until the matter is investigated and rectified. Through investigation, it was verified that one Electric Motor of the two of FWD Hydraulic Power Unit (HPU) was tripped and it was decided such to be replaced with the same (capacity & performance) motor installed in the identical and independent AFT HPU. Once the replacement was completed on same day, it was advised by Pilot mooring operation to take place the following day and vessel to proceed at anchorage. Eventually, vessel successfully completed her mooring operation with FSO at Escravos. Incident had been timely reported by Master to Company’s DPA, responsible Superintendent and Charterers, in accordance with Company’s Procedures and Charterers’ Instructions. Root Causes I. Substandard Actions: ●● Not timely identifying the loose cable in electrical starter panel Lessons learned In case the deck machinery hydraulic oil system fails, don’t hesitate to abort mooring operation. FWD HPU motor defective Electric motor windings inspection Electric motor terminal box
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