Journal of Failure Analysis and Prevention

, Volume 17, Issue 6, pp 1131–1138 | Cite as

Analysis of Oil Debris in an Aero Gas Turbine Engine

  • R. K. Mishra
  • Prashant Kumar
  • L. Prakash
Technical Article---Peer-Reviewed


Oil debris count is an important health monitoring parameter in aero gas turbine engine. Present paper deals with the oil debris analysis collected from the bearing houses and gear box of a military gas turbine engine. Due to relative motion between stationary parts, wearing-out has taken place in turbine bearing house. Improper assembly or dimensional inaccuracies found to be the root cause of high debris generation. For wearing-out of the drive shaft in gear box, lapses in assembly procedure and improper tolerances are found to be responsible. Though high ‘g’ maneuvers of the aircraft, hard landings, missile launch and bird hit or foreign object impact can lead to such high debris in the oil circuit, utmost care needs to be taken during assembly.


Debris count Oil debris Magnetic chip detector Aero gas turbine engine 



The authors are very grateful to the Chief Executive, CEMILAC, Bangalore, India, for his kind permission for publishing this paper. The authors are also very thankful to the General Manager and Engineers of Hindustan Aeronautics Limited, Bangalore, and Officers of Aeronautical Quality Assurance (Engines), Bangalore, for their cooperation and support during this study.


  1. 1.
    H.I.H. Saravanamuttoo, G.F.C. Rogers, H. Cohen, Gas Turbine Theory (Pearson Education, London, 2001)Google Scholar
  2. 2.
    P.P. Walsh, P. Fletcher, Gas Turbine Performance (Wiley, London, 2004)CrossRefGoogle Scholar
  3. 3.
    R. Bhaskar, Aircraft Propulsion (Elsevier, India, 2008)Google Scholar
  4. 4.
    T. Tauber, Full-flow debris monitoring in gas turbine engines, in ASME paper, (1981), pp. 9–12Google Scholar
  5. 5.
    R.F. Orsagh, J. Sheldon, C. Klenke, Prognostics/diagnostics for gas turbine engine bearings, in Proceedings of IEEE Aerospace Conference (2003)Google Scholar
  6. 6.
    T.H.C. Childs, A. Mimaroglu, Sliding friction and wear up to 600 C of high speed steels and silicon nitrides for gas turbine bearings. Wear 162, 890–896 (1993)CrossRefGoogle Scholar
  7. 7.
    I. Salam, A. Tauqir, A.U. Haq, A.Q. Khan, An air crash due to fatigue failure of a ball bearing. Eng. Fail. Anal. 5(4), 261–269 (1998)CrossRefGoogle Scholar
  8. 8.
    R.K. Mishra, S.K. Muduli, K. Srinivasan, S.I. Ahmed, Investigation of an inter-shaft bearing failure in an aero gas turbine engine. J. Fail. Anal. Prev. 15(2), 205–210 (2015). doi: 10.1007/s11668-015-9933-8 CrossRefGoogle Scholar
  9. 9.
    Y. Diab, F. Ville, P. Velex, Investigations on power losses in high-speed gears. Proc. Inst. Mech. Eng. Part J: J. Eng. Tribol. 220(3), 191–198 (2006)CrossRefGoogle Scholar
  10. 10.
    H.N. Özgüven, D.R. Houser, Dynamic analysis of high speed gears by using loaded static transmission error. J. Sound Vib. 125(1), 71–83 (1988)CrossRefGoogle Scholar
  11. 11.
    J.L. Miller, D. Kitaljevich, In-line oil debris monitor for aircraft engine condition assessment, in 2000 IEEE Aerospace Conference Proceedings, vol. 6, pp. 49–56Google Scholar
  12. 12.
    P.J. Dempsey, N. Bolander, C. Haynes, A.M. Toms, Investigation of Bearing Fatigue Damage Life Prediction Using Oil Debris Monitoring, NASA/TM-2011-217117 (NASA, Washington, DC, 2011)Google Scholar
  13. 13.
    L.C. Jaw, Recent advancements in aircraft engine health management (EHM) technologies and recommendations for the next step, in ASME Paper No. GT2005-68625 (2005)Google Scholar
  14. 14.
    J. Edmonds, M.S. Resner, K. Shkarlet, Detection of precursor wear debris in lubrication systems. in Aerospace Conference Proceedings, 2000 IEEE. vol. 6. IEEE, 2000Google Scholar
  15. 15.
    D. Scott, Debris examination—a prognostic approach to failure prevention. Wear 34(1), 15–22 (1975)CrossRefGoogle Scholar
  16. 16.
    I. Tauqir, A. Salam, A.Q. Haq, Khan, Causes of fatigue failure in the main bearing of an aero-engine. Eng. Fail. Anal. 7(2), 127–144 (2000)CrossRefGoogle Scholar
  17. 17.
    T.A. Harris, R.M. Barnsby, Tribological performance prediction of aircraft gas turbine mainshaft ball bearings. Tribol. Trans. 41(1), 60–68 (1998)Google Scholar
  18. 18.
    J. Halme, P. Anderson, Rolling contact fatigue and wear fundamentals for rolling bearing diagnostics—state of the art. Proc. IMechE 224, 377–393 (2009)CrossRefGoogle Scholar
  19. 19.
    N. Ejaz, I. Salam, A. Tauqir, Failure analysis of an aero engine ball bearing. J. Fail. Anal. Prev. 6(6), 25–31 (2006)CrossRefGoogle Scholar
  20. 20.
    A.K. Das, Metallurgy of Failure Analysis (McGraw Hill, NY, 1997)Google Scholar
  21. 21.
    R. Reichelt, Scanning electron microscopy, in Science of Microscopy. Springer, New York, 2007, pp. 133–272.Google Scholar

Copyright information

© ASM International 2017

Authors and Affiliations

  1. 1.Regional Center for Military Airworthiness (Engines)BangaloreIndia

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