Failure analysis of nose wheel assembly of an aircraft

Madan, M and Sujata, M and Raghavendra, K and Gore, P and Bhaumik, SK (2011) Failure analysis of nose wheel assembly of an aircraft. Project Report. National Aerospace Laboratories, Bangalore, India.

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Abstract

Damaged components of the nose wheel assembly of an aircraft were sent to this laboratory for investigation. Examination revealed damages to all components of the assembly to various extents. The starboard bearing was severely damaged and the outer race had cracked. Correspondingly, the orifice of the starboard half of the hub was also severely damaged and it got enlarged. Evidences suggest that the axial load on the bearings grossly exceeded the design load leading to fracturing of the outer race of the starboard bearing and its dislodgement. The axial load was such that the wheel hub moved on the axle towards right. The damages seen on the port bearing is negligible, because in this case, the wheel hub moved along with the bearing and the outer race could come out of the bearing without any obstruction. The movement of the outer race in this case was similar to that during dis-assembly of any conical bearing. Analysis showed that the failure in the bearings is secondary in nature and it appears to have occurred due to excessive axial load. A detailed analysis of the failure is presented in this report.

Item Type: Proj.Doc/Technical Report (Project Report)
Uncontrolled Keywords: Aircraft;Nose wheel assembly;Bearing failure;Axial load
Subjects: AERONAUTICS > Aeronautics (General)
CHEMISTRY AND MATERIALS > Chemistry and Materials (General)
Division/Department: Materials Science Division, Materials Science Division, Materials Science Division, Other, Materials Science Division
Depositing User: Ms. Alphones Mary
Date Deposited: 12 Jul 2011 10:33
Last Modified: 12 Jul 2011 10:33
URI: http://nal-ir.nal.res.in/id/eprint/9339

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