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Is it an "RC ALLEN" TC....they are the worst. After a number of phone calls
about
ours ( TC) and most of the shops who don't like RC ALLEN, it's best to
change it.
The cost is low and the piece of mind is worth every penny....

John CFI

C J Campbell <christophercampbellNOSPAM@hotmail.com> wrote in message
news:dy3u6.55042$zV3.4641273@news1.frmt1.sfba.home.com...
> Beyond what the others have said:
>
> Suspect worn bearings on either the AI, the TC, or both.
>
> "Jim Black" <jecblack@mail.com> wrote in message
> news:82Ct6.52822$zV3.4205351@news1.frmt1.sfba.home.com...
> > I am an instrument student and when practising timed turns (180 or 360
> > degrees) in my plane (1998 Archer III) standard rate turns to the right
> come
> > out significantly different than turns to the left by almost thirty
> > degrees! At first I suspected my DG was precessing, but no, it agrees
with
> > the whiskey compass at the end of either turn! I then suspected I was
not
> > holding the same bank angle left and right, but no, close inspection and
> > scrutiny by my instructor confirms I'm doing them both the same (15
> degrees
> > at 100kts IAS). I then suspected my vacuum pump, but no, using the
> > auxilliary (electric) vacuum system gives the same result! I suspected
my
> > stopwatch - but no!
> >
> > I have it scheduled into the shop for some other work later this week,
but
> > I'd like to have some other theories as to what might cause this for
when
> I
> > talk with my mechanic.
> >
> > Any suggestions?
> >
> > Jim
> >
> >
>
>

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