In a message dated 97-03-04 22:54:54 EST, mdunst@smtplink.coh.org (Dunst,
Mordecai) writes:
> Q) Conventional wisdom dictates that a magnafluxed piece of
> ferrous metal is OK to use. Suppose that piece of metal has been
> used for MANY hours...under hard loads. i.e. a buddy of mine has
> an older airplane. About 8,000 hrs on the engine. He has the
> standard annual and has the crank magnafluxed-"OK". He says the
> FAA says its ok to re-use. Is it?
>
> When does a piece of metal become unsafe to re-use even if it meets
> specs?. How can you tell in a cost effective way.?
>
> It seems that magnafluxing is an operator dependant task i.e. someone
> can spend a little time or a lot of time on the procedure.....
>
> Mordy
A magnafluxed piece from a company that's FAA approved should come with a
certificate.
Those that come from Joe magnafluxer probably will not.
Die penetrant is also widely used.
Bruce McGuire
|