Analysis of failed bonded seal of main undercarriage jack of an aircraft

Bhaumik, SK (2004) Analysis of failed bonded seal of main undercarriage jack of an aircraft. Project Report. National Aerospace Laboratories, Bangalore.

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Abstract

Two failed bonded seals of main undercarriage jack of an aircraft were forwarded to the laboratory for analysing the cause of failure. Analysis suggests that the bonded seals were damaged at the time of assembly itself which subsequently led to the hydraulic leak on use. Dimensional check indicated that either the bolt with higher shank diameter or bonded seal with lesser inner diameter than that recommended by the seal manufacturer was used in the assembly. This had resulted in the extrusion of the sealing elastomer material through the bolt head – washer interface leading to the damage to the seal. This was demonstrated by dis-assembling a newly assembled seal. A detailed analysis is presented in this report.

Item Type: Proj.Doc/Technical Report (Project Report)
Uncontrolled Keywords: Aircraft;banjo bolt;bonded seal
Subjects: AERONAUTICS > Aeronautics (General)
CHEMISTRY AND MATERIALS > Chemistry and Materials (General)
Division/Department: Materials Science Division
Depositing User: Mrs Manoranjitha M D
Date Deposited: 27 Jul 2011 10:48
Last Modified: 27 Jul 2011 10:48
URI: http://nal-ir.nal.res.in/id/eprint/9682

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