ENGINEERING INCIDENT REPORT

Vessel Name:

Date:

Location: Anchored in river following object strike

Reporting Officer: Second Engineer

SUBJECT: Inspection Following Propeller Strike During River Passage

Incident Overview:

While proceeding on river passage at dead slow ahead revolutions, the vessel’s propeller struck a large floating object. A momentary drop in engine RPM was noted in the Engine Control Room, indicating a possible impact or obstruction in the propulsion system. The vessel was safely anchored following the incident. No external assistance is available at present.

To assess the integrity and operability of the vessel’s propulsion and transmission systems following the suspected strike, and to determine if the vessel is safe to resume its voyage, the following inspection and checks were carried out:

A. Main Engine and Shafting System

• Engine Performance Data Monitoring:
  • Compare pre- and post-incident RPM, lube oil pressure, and exhaust gas temperatures.
  • Monitor for unusual vibration, noise, or fluctuations in pressure.
• Crankcase Inspection:
  • If temperature permits, open crankcase doors.
  • Check for metal debris, gear lash issues, and the general condition of crankshaft and bearings.
• Turning Gear Operation:
  • Engage turning gear.
  • Manually rotate shaft to check for resistance, uneven movement, or abnormal sounds.
• Alignment and Vibration Check:
  • Use handheld vibration analyzer (if available) to assess main engine and shaft vibration.

  B. Stern Tube and Tailshaft

  • Lube Oil System Checks:
    • Verify stern tube lube oil level.
    • Take samples to check for metallic particles, emulsification, or water contamination.
  • Tailshaft Seal Inspection:
    • Conduct visual inspection from shaft tunnel and stern area (as accessible).
    • Look for signs of oil leakage, damaged seals, or abnormal wear.

    C. Propeller and Underwater Gear

    • Diverless Inspection (if divers unavailable):
      • Deploy drop camera or waterproof GoPro from the stern.
      • Use underwater light and calm-water reflection to inspect propeller blades.
      • Listen for unusual noises during manual shaft rotation or when briefly engaging ahead/astern.
      • Observe wake pattern for irregularities when running at very low speed in calm water.

      Conclusion:

      Based on the inspection, the propulsion and transmission system does not show evidence of damage that could compromise vessel safety. Pending final analysis, the vessel is considered fit to resume voyage.

      • As NO major damage is detected:
        • Resume operations at reduced speed under close monitoring.
        • Schedule professional underwater inspection at the next port with appropriate facilities.