were the replacements done with used or new instruments?
I know the place I did my flight training always used used DG's and they
seemed to go out all the time in the warriors, the mechanic said it was due
to using the used parts all the time and not getting the DG's sent in to be
overhauled.


"O. Sami Saydjari" wrote:

As I reading through my aircraft logs, I noticed several replacements of
the Directional Gyro and Turn Coordinator. The plane is a 1978 Piper
Turbo Arrow 3. Is is normal to need to replace these things every 4-5
years?

Does anyone keep statistics or even projections for the mean time
between failures on airplane parts? It sure would be useful to know.
One would think the manufacturers would publish such information.

-Sami