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Bus Door
Failure
Metallurgical failure analysis was requested after a
bus door failure. Examination and analysis focused
on the door opening mechanism and the mounting plate
for the door opening mechanism. The mounting
plate for the door opening mechanism was observed to
be visibly deformed. The design of the
plate was also analyzed. The cause of the failure
was determined to be deficient design, resulting in
deformation of the bus
door opening mechanism.
Photograph A: Overall view of failed bus door opening mechanism
prior to removal from the subject bus.
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 Dr.
R. Craig Jerner, Ph.D., PE specializes in accident
investigation and metallurgical failure analysis,
with over 30 years experience as a metallurgical
consultant and accident investigator. He has
testified as a metallurgical expert in over 250
depositions and more than 70 court appearances. If you or someone you know should need the services of Dr. Jerner and J.E.I. Metallurgical, please visit our web site at the buttons below, or e-mail Dr. Jerner --- r.c.jerner@metallurgist.com |
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