Failure analysis of intermediate gearbox of a helicopter

Parameswara, MA and Venkataswamy, MA and Madan, M and Sujata, M and Suresh Kumar, M and Bhaumik, SK (2005) Failure analysis of intermediate gearbox of a helicopter. Project Report. National Aerospace Laboratories, Bangalore.

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Abstract

The IGB failure was due to fatigue fracture of the driving gear. There were three major fatigue cracks and six fatigue crack origins. Failure pattern and damages on the teeth suggest that the fatigue crack initiation was due to excessive load on the gear. It appears that the extraordinary high load on the gear was due to misalignment in the gear train, which would have occurred during the assembly after the last overhaul of the IGB. No metallurgical and/or mechanical abnormalities in the gear were responsible for the fatigue crack initiation.

Item Type: Proj.Doc/Technical Report (Project Report)
Uncontrolled Keywords: Helicopter, intermediate gearbox, gear, fatigue, misalignment
Subjects: AERONAUTICS > Aeronautics (General)
CHEMISTRY AND MATERIALS > Chemistry and Materials (General)
Division/Department: Materials Science Division, Materials Science Division, Materials Science Division, Materials Science Division, Materials Science Division, Materials Science Division
Depositing User: Mrs Manoranjitha M D
Date Deposited: 14 Nov 2011 10:19
Last Modified: 14 Nov 2011 10:19
URI: http://nal-ir.nal.res.in/id/eprint/10011

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