Journal of Failure Analysis and Prevention

, Volume 14, Issue 5, pp 578–587 | Cite as

Failure Analysis of Nozzle Guide Vane of a Low Pressure Turbine in an Aero Gas Turbine Engine

  • R. K. Mishra
  • Johney Thomas
  • K. Srinivasan
  • Vaishakhi Nandi
  • Raghavendra Bhat
Case History---Peer-Reviewed


Failure of low pressure turbine nozzle guide vane (NGV) in an aero gas turbine engine is analyzed to determine its root cause. Forensic and metallurgical investigations are carried out on the NGV failed as well as the failed components of the downstream modules. Failure in the cooling system in the NGV due to crack in the sealing plate was found to be the cause of NGV getting burnt. This failure has caused extensive damages in low pressure turbine modules. Remedial measures are also suggested to prevent such failures.


Failure analysis Cracks Forensic analysis Corrosion Oxidation 



The authors are very grateful to the Executive Director, Engine Division, Hindustan Aeronautics Limited, General Manager, Foundry & Forge Division, Hindustan Aeronautics Limited and Chief Executive (Airworthiness), CEMILAC for their kind permission for publishing this paper.


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Copyright information

© ASM International 2014

Authors and Affiliations

  • R. K. Mishra
    • 1
  • Johney Thomas
    • 2
  • K. Srinivasan
    • 2
  • Vaishakhi Nandi
    • 3
  • Raghavendra Bhat
    • 3
  1. 1.Regional Centre for Military AirworthinessBangaloreIndia
  2. 2.Hindustan Aeronautics Limited - Engine DivisionBangaloreIndia
  3. 3.Hindustan Aeronautics Limited, Foundry & Forge DivisionBangaloreIndia

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