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This is a reprint of a msg I received from another list I subscribe to and
thought the information would be appreciated by most here on the LML. Happy building....

  <Marv>
  

Go to http://www.parker.com/stratoflex/news
and click on the article "Be Hose-Safe"

By the way,   Parker does not report the
leakage of the teflon lined hoses here, only
the shelf life issue and general good information
about hoses in your aircraft.  The hose leakage if
from Lt Plane Maintenance or Av Consumer, --
a SDR (service diffifulty report) on the
teflon lined hoses.

For clarification, teflon hoses are not dangerous,
per se, just EXTREMELY expensive and not
particularly better than Stratoflex 111 hoses, other
than they are a bit lighter and look really cool.  The
main advantage is for wholesalers who can keep premade
hose kits on the shelf indefinitely.  With the rubber hoses
they have a shelf life, even when unused.

Unfortunately a lot of false info is out there about
how indestructable teflon lined hoses are and
how they last forever.  Probably a holdover from
the excellent marketing of Teflon by DuPont 30
years ago as a miracle material.  Teflon wiring
insulation was a craze 10 yrs ago, and the military
eventually found out that it would flow under
long term pressure and cause shorts.  The current
mil spec wire insulation is Tefzel, which does not
flow.  Similarly, the glut of Teflon oil additives, now
DuPont will sue anyone using the name Teflon in
a crankcase oil additive.  Note that they now
contain PTFE, the chemical name.

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