• The analysis determines if the oil is still suitable for use. This includes factors like viscosity, TBN, oxidation level, and contamination levels
• The presence and quantities of contaminants like water, metal particles, and fuel dilution can indicate leaks, wear and tear, or other issues within the engine.
• By identifying contaminants or changes in oil properties, potential problems can be detected before they lead to engine breakdowns, allowing for preventive maintenance.
• Based on the condition of the oil and detected contaminants, maintenance schedules can be adjusted, ensuring that necessary repairs or part replacements are done timely.
• Proper lubrication, monitored through analysis, helps extend the operational life of engine components.
• Oil analysis reduces unnecessary oil changes, minimizing waste oil generation and lowering operating costs.
• Each element detected in the oil can be traced back to its source, providing detailed insights into the engine's condition and helping to pinpoint specific issues.

(i) Fault Analysis:

• A vibration signature of the turbocharger is recorded during sea trials and stored in the onboard computer.
• During operation, deterioration of turbocharger condition causes vibration levels to rise.
• Regular measurements are taken using a portable vibration analyser, with data fed into the computer.
• This data is compared with baseline/original records. If vibration exceeds set limits, automatic engine shutdown may occur, and the cause is investigated.
• Common checks include foundation bolt tightness and bearing condition.
• Excessive vibration can also result from rotor imbalance due to deposits on the turbine or compressor sides.

(ii) Condition Monitoring with Respect to Maintenance:

• Over time, wear of turbocharger components leads to gradual vibration increase.
• Comparing current readings with baseline data helps determine the actual condition of the turbocharger.
• Maintenance can then be scheduled before vibration levels reach a point that could cause a complete breakdown.

(iii) Substitute for Opening Machinery During Survey:

• If vibration measurements are recorded and stored continuously, and values remain within permissible limits, these records can serve as proof of satisfactory operation for survey purposes.
• If abnormal readings were previously corrected through repairs, and follow-up measurements show satisfactory results, surveyors may accept the documented data.
• This can eliminate the need for physically opening the turbocharger during surveys, satisfying survey requirements through documented evidence.