Corrective Maintenance, carried out only after equipment failure has occurred

Routine/Preventive Maintenance, done periodically to avoid unexpected faults

Scheduled Major Overhaul, performed after a specific operational hour threshold

Emergency Maintenance, triggered when a critical system shuts down suddenly

Lubrication Operation Test Order, used to verify oil circulation before startup

Level Operation Timing Outline, a procedure to control load application rates

Lock-Out/Tag-Out, a safety method to isolate and secure hazardous energy sources

Low Overheat Temperature Override, a system that prevents excessive temperature rise

Cooling water pumps only, due to their high exposure to temperature fluctuations

Turbine blades and vanes, as they face extreme stress, heat, and rotational forces

Lubrication filters exclusively, since they accumulate impurities during operation

Fuel injectors, because they regulate flow and atomization under combustion pressure

Locking and tagging energy sources to prevent accidental re-energization

Measuring ambient temperature only to verify safe working conditions

Checking fuel viscosity exclusively before starting disassembly operations

Igniting residual fuel to confirm combustion chamber clearance

Reflective vests exclusively, to ensure visibility inside confined compartments

Life jackets and hearing aids only, especially in shipboard environments

Heat-resistant gloves, goggles, and safety boots to protect against burns and impact

Fireproof suits without gloves, to protect only the body from radiant heat

Oil/fuel leaks, corrosion, and foreign object debris around critical components

Exhaust gas temperature only, to assess combustion chamber condition

Starter motor rotation exclusively, to confirm mechanical integrity

Ambient air humidity only, to measure atmospheric working conditions

Fuel viscosity adjustment only, to improve spray characteristics

Leak tests, sensor checks, dry rotation, and trial start to ensure readiness

Fire extinguisher replacement exclusively, to comply with safety requirements

Cooling water flow measurement only, to confirm circulation rate

Inspecting fuel nozzles and cleaning carbon deposits to maintain proper combustion

Aligning starter motor exclusively, to ensure smooth engine acceleration

Purging ventilation lines only, to prevent pressure build-up in ducts

Checking oil pump pressure only, to verify lubrication circuit performance

Air intake system only, to ensure adequate oxygen delivery

Control and monitoring system, to verify accurate sensor feedback and system response

Lubrication system exclusively, to guarantee smooth mechanical operation

Fuel injection system only, to check spray pattern and flow rates

Ambient temperature below the required operating range, affecting thermal balance

Fire extinguisher system positioned too close to the exhaust section, altering airflow

Misalignment or foreign object debris in the rotating assembly causing imbalance

Fuel viscosity too high, resulting in incomplete combustion and load fluctuations

Incorrect seal installation or worn seal components failing to maintain pressure containment

Sensor calibration drift caused by previous electrical interference during inspection

Fuel pressure too low to achieve sufficient atomization during startup operations

Ventilation system over-pressurized, forcing air into the lubrication circuits

Cooling water overcapacity causing incomplete combustion cycles and unburnt residues

Incomplete fuel combustion or irregular maintenance leading to soot accumulation

Excess lubrication oil flow entering the combustion chamber and mixing with fuel

Misaligned starter motor affecting ignition timing during repeated starts

Turbine blade alignment incorrect, leading to imbalance during startup sequence

Oil filter clogged and restricting lubrication flow through key components

Electrical isolation not properly restored or mechanical fault present in the pump

Ambient air too cold for the fuel delivery system to function effectively

Fuel line purging incomplete, causing erratic combustion pressure readings

Wear, damage, or improper handling during maintenance affecting sensor precision

Excess torque on fasteners altering sensor mount alignment and signal quality

Low oxygen concentration in the compartment affecting sensor feedback signals

Excessive lubrication oil flow, creating suction and sealing between moving parts

Incorrect sensor calibration causing misleading pressure readings during disassembly

Thermal expansion or corrosion of parts increasing friction and mechanical binding

Low ambient temperature reducing material flexibility during removal

Interlock or sensor miscalibration causing false safety or operational signals

Fuel valve partially open, creating inconsistent pressure within the combustion system

Overfilled lubrication system leading to unexpected pressure build-up

Foreign object debris in ventilation ducts restricting airflow detection

Ambient air contamination alone, causing slight erosion but not mechanical failure

Improper ventilation only, leading to localized temperature fluctuations

Incorrect oil type exclusively, resulting in reduced lubrication at contact points

Foreign object impact or overheating during operation causing structural damage

Misaligned turbine casing causing uneven thermal transfer across surfaces

Blockage, pump failure, or fouling in the system reducing heat transfer efficiency

Excess lubrication oil circulation interfering with cooling flow patterns

Carbon deposits in the combustion chamber reducing heat absorption capacity

Fuel pump pressure too high, leading to fluctuating combustion cycles

Mechanical misalignment or FOD undetected by sensors causing imbalance

Cooling system overcapacity resulting in excessive thermal contraction

Ventilation system underperforming and reducing turbine aerodynamic stability