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At present I have a component that was unsuccesfully vacuum brazed. Vanes installed have two voids in the braze joint. They were tack welded with AMS 5774 weld wire and brazed with AMS 4777 Silver Braze Alloy. The OEM repair is fuzzy here. If accepted the next step would cryogenically freeze the...

I have been out of the power industry for some time but I do recall some of the do's and dont's. Typically, if it is not fixed after three attempts it is replaced. I am not sure if you are talking about a butt joint from a pipe to a nipple or a saddle weld from the boiler to the nipple. If you...

When distortion is a concern during HT, fixturing the component works well for us.

Tony C, The first step in the HVOF process is to roughen up the surface with a 60 grit Aluminum Oxide blast. This in itself would make Penetrant examination impossible. The whole point of the inspection is to assure the quality of the base material prior to covering it up. Hope this helps...

Avio, It has been my experience that what you learned in school or common sense have never been factored into cleaning, inspection or repairs of aircraft components. I for one have never read the reference SIP. My experience has been limited to PWA, GE, CFMI and Honeywell so we may not be...