This is an unedited manuscript accepted for publication and provided as an Article in Press for early access at the author’s request. The article will undergo copyediting, typesetting, and galley proof review before final publication. Please be aware that errors may be identified during production that could affect the content. All legal disclaimers of the journal apply.
Sandeep Prajapati,
- Chartered Accountant, Member of Institute of Chartered Accountants of India Senior Operations Manager in Genpact LLC (USA), New York, United States
Abstract
When an engine runs, it produces heat and there is a range of temperature in the engine chamber. For Jet Engines, when it starts, temperature starts increasing within a range. At various durations of the engine run, there is some temperature. Higher the thrust, higher the heat temperature. This temperature is called Exhaust Gas Temperature (EGT). There is a maximum allowed gas temperature for each type of engine and the difference between the actual gas temperature and the maximum temperature is called EGT Margin (EGTM). Every Airline target to get the margin as high as possible. An increased EGT margin suggests that the engine is functioning efficiently and can withstand greater heat before hitting critical temperature limits. As time passes, factors such as engine wear, environmental conditions, and operational stress can reduce the EGT margin. Therefore, it is essential to continuously monitor engine performance parameters in real- time. To monitor trends in EGT and forecast maintenance needs, advanced engine health monitoring systems are utilized. Keeping an ideal EGT margin boosts fuel efficiency while minimizing the chances of engine harm and unexpected maintenance. Consequently, effective management of EGT and EGTM is vital for enhancing reliability, reducing operational costs, and guaranteeing safe and sustainable aviation operations.
Keywords: EGT Margin, Thrust, Margin, Aerospace, Airline and Engine
Sandeep Prajapati. EGT Margin of A Jet Engine – Cause, Impact, Improvement & Simulation Theory. Journal of Aerospace Engineering & Technology. 2026; 16(01):-.
Sandeep Prajapati. EGT Margin of A Jet Engine – Cause, Impact, Improvement & Simulation Theory. Journal of Aerospace Engineering & Technology. 2026; 16(01):-. Available from: https://journals.stmjournals.com/joaet/article=2026/view=243304
References
1. Zhdanov V, Grakovski A. Jet Engine Health Assessment Using EGT Time. InReliability and Statistics in Transportation and Communication: Selected Papers from the 22nd International Multidisciplinary Conference on Reliability and Statistics in Transportation and Communication: Artificial Intelligence in Transportation, RelStat-2022, October 20- 21, 2022, Riga, Latvia 2023 Feb 20 (p. 101). Springer Nature.
2. Goeing J, Seehausen H, Pak V, Lueck S, Seume JR, Friedrichs J. Influence of combined compressor and turbine deterioration on the overall performance of a jet engine using RANS simulation and Pseudo Bond Graph approach. Journal of the Global Power and Propulsion Society. 2020 Dec 22;4:296-308.
3. Adamczuk RR, Buske C, Roehle I, Hennecke C, Dinkelacker F, Seume JR. Impact of defects and damage in aircraft engines on the exhaust jet. InTurbo Expo: Power for Land, Sea, and Air 2013 Jun 3 (Vol. 55133, p. V002T01A021). American Society of Mechanical Engineers.
4. Volponi AJ. Gas turbine engine health management: past, present and future trends. InTurbo Expo: Power for Land, Sea, and Air 2013 Jun 3 (Vol. 55294, p. V008T46A001). American Society of Mechanical Engineers.
5. Ellis M, Bojdo N, Filippone A, Clarkson R. Monte carlo predictions of aero-engine performance degradation due to particle ingestion. Aerospace. 2021 May 25;8(6):146.
6. De Giorgi MG, Menga N, Ficarella A. Exploring prognostic and diagnostic techniques for jet engine health monitoring: a review of degradation mechanisms and advanced prediction strategies. Energies. 2023 Mar 14;16(6):2711.
7. Davis M, Hale A, Beale D. An argument for enhancement of the current inlet distortion ground test practice for aircraft gas turbine engines. J. Turbomach.. 2002 Apr 1;124(2):235-41.
8. Borst C, Sjer FA, Mulder M, Van Paassen MM, Mulder JA. Ecological approach to support pilot terrain awareness after total engine failure. Journal of Aircraft. 2008 Jan;45(1):159-71.
9. Saxena A, Goebel K, Simon D, Eklund N. Damage propagation modeling for aircraft engine run-to-failure simulation. In2008 international conference on prognostics and health management 2008 Oct 6 (pp. 1-9). IEEE.
10. Hoenen HT, Ellenberger K. Jet engine compressor blade refurbishment by application of the advanced re-contouring process. InTurbo Expo: Power for Land, Sea, and Air 2003 Jan 1 (Vol. 3686, pp. 619-624).
Journal of Aerospace Engineering & Technology
| Volume | 16 |
| 01 | |
| Received | 19/02/2026 |
| Accepted | 28/02/2026 |
| Published | 09/05/2026 |
| Publication Time | 79 Days |
Login
PlumX Metrics