The yellow tag only means it's yellow, a repair station could use yellow for
rejected parts. the important part is the"overhauled per this or that
manual" even then unless you are cognizant of ALL the manual requirements,
including reference documents, and followed your particular part through the
repair process making sure that actually happened, you probably didn't get
what you paid fo.
The FSDO folks that oversee these repair stations aren't familiar with all
of these requirements either and only look into things when there has been
an accident or complaint, otherwise it's business as usual.Most of the time
there won't be a problem, but who wants to volunteer to be there when it
happens?

"Denny" wrote in message
oups.com...
The local FBO just had two exhaust valves go bad on his C180.... Pulled
the cylinders and sent them out to a cylinder shop for overhaul... They
came back yellow tagged... He re-installed the cylinders back on the
same piston they came off from, and on one could not get the exhaust
pipe to line up... What the hey? Gets out a strong light (why do all
mechanics work in a shop that is dimmer than a confessional booth?) and
takes a look... The head was re-installed on the barrel ten degrees out
of alignment...

I just went through a big thrash on a carburetor that was supposedly
zero timed from the re-manufacturer... It was defective out of the
box, TWO times in a row...

So yellow isn't necessarily the answer...

denny