Skip to Main Content
Skip Nav Destination


A 52000 bearing steel valve guide component operating in the fuel supply system of a transport aircraft broke into two pieces after 26 h of flight. The valve guide fractured through a set of elongated holes that had been electrodischarge machined into the component. Analysis indicated that the part failed by low cycle fatigue. The fracture was brittle in nature and had originated at a severely eroded zone of craters in a hard, deep white layer that was the result of remelting during electrodischarge machining. It was recommended that the remaining parts be inspected using a stereoscopic microscope and/or a borescope.

You do not currently have access to this chapter.
Don't already have an account? Register

A.K. Das, Failure of a Transport Aircraft Relay Valve Guide, Handbook of Case Histories in Failure Analysis, Vol 2, Edited By Khlefa A. Esaklul, ASM International, 1993, p 28–29,

Download citation file:

Close Modal

or Create an Account

Close Modal
Close Modal