An analysis of the effectiveness of engine gas path cleaning (EGPC) was conducted on a General Electric engine used by the aircraft. The main objectives of the study were to evaluate the impact of EGPC on engine performance, specifically on the Exhaust Gas Temperature (EGT) and EGT Margin parameters, and to determine the most efficient maintenance interval to maintain optimal performance. Data were collected from four engines spanning a one-year period before and after the maintenance. The methods used included direct observation, interviews with technical personnel, and analysis of operational data obtained from the My GE Aerospace Fleet Monitor portal. The results showed an increase in EGT Margin of 7.4 to 11.2°C and a decrease in actual EGT between 5.5 and 35.4°C in the first 50 flights after EGPC was performed. However, the benefits of this treatment only lasted for a range of 299 to 483 flight cycles, with an average effective period of approximately 372 cycles, before performance returned to its original condition. Based on these results, it is recommended to change the EGPC interval from 500 to 350 flight cycles to maintain engine efficiency and prevent excessive EGT increases. Further research is recommended to evaluate the long-term impact of increasing the EGPC frequency on corrosion risk, fuel consumption, and overall engine maintenance costs.