Appendix A: Items Required for Extra Inspection 1.


Is the main propulsion device (prime mover) normal? Preventing main propulsion unit failure requires self-examination from the aspects of oil, gas, water, and electricity. It should focus on the fuel system, lubricating oil system, air system, cooling water system and main engine control system.


- Whether the fuel system of the main propulsion unit is normal (fuel supply unit, high-pressure oil pump, oil pipe, oil leakage monitoring, fuel heating, automatic fuel pump switching (if any), etc.).


- Whether the communication facilities such as the console and driving platform clock are normal, and whether the nearby instruments such as the tachometer are normal.


- Is the starting air system of the main propulsion device normal (main starting air bottle pressure, main air compressor, main starting valve, cylinder starting valve, air distributor, etc.).


- Whether the main engine’s lubricating oil system is normal (whether there are traces of leakage in the pipelines and filter joints, whether the pressure gauge display is normal, whether the sensor joints are firm, whether the lubricating oil pump automatically switches (if any), etc.).


- Whether the cooling water system of the main engine is normal (whether there are traces of leakage in the pipelines and coolers, whether the pressure gauge display is normal, whether the sensor joint is firm, whether the cooling water pump switches automatically (if any), etc.).


- Check whether the host control air system is normal (control air pressure, control whether there is water in the air, etc.).


- Main engine retreat measures (adjustable propeller blade pitch control system, clutch).


2.


Are the main propulsion device security, monitoring remote control and other ancillary equipment normal?


- To prevent the failure of the security system of the main propulsion unit, it is necessary to conduct self-examination from the aspects of oil mist concentration detector, oil pressure loss protection, and overspeed protection function reliability.


- Whether the main diesel engine overspeed alarm and emergency stopping device are normal.


- Whether the main diesel engine lubricating oil low pressure, cylinder jacket water high temperature alarm and automatic shutdown protection devices are normal.


- Are the main diesel engine oil mist concentration detector and main bearing temperature detector normal? (Only applicable to sea-going ships and unattended engine rooms with diesel engine power greater than 2250KW or cylinder inner diameter greater than 300mm).


- Check whether there are alarm records related to main propulsion system security and automatic parking devices in the centralized monitoring system. (Only applicable to sea-going ships).


- Whether the low-pressure oil pressure alarm device of the gear transmission device is normal. For gear transmission devices with an input power greater than 1470kW, whether the high-lubrication oil high- temperature alarm device is normal. (Applicable to sea-going ships).


3.


Is the ship’s steam boiler normal? The boiler can adjust the oil and water temperature through steam heating to ensure that the diesel engine operates within normal operating conditions. To prevent boiler failure, it is recommended to conduct self-examination from the water supply system, combustion system, safety protection, etc.


- Whether the water supply system is normal (number of water supply pumps, water supply quality, water level indicating device, etc.).


- Whether the combustion system is normal (ignition, fuel supply, air supply, etc.).


- Whether the security system is normal (safety valve, air supply, flame extinguishing, low water level alarm, etc.).


84 | ISSUE 109 | SEP 2024 | THE REPORT


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