On Mar 26, 9:15 am, wrote:
In rec.aviation.owning wrote:
Just got a "service Letter in the mail from Parker. Dated Feb 15,
2008 It states that "All Parker/Airborne engine driven air pumps are
beyond their mandatory replacement time and must be removed from
services"
Bascally they are saying that if you have a Parker/Airborne Vac Pump
that its toast, remove it before the next flight. Now I dont, mine is
a Garwin wet unit, but this seems like this is either a blanket get
out of jail liability card or one hell of a way to make some money.
The letter goes on to say that they realize that owners have a choice
of using a new or overhauled unit but "owners/pilots must be aware of
the increased risk of pneumatic system failure when using overhauled
or reconditioned pumps. An overhauled/reconditioned Parker/Airborne
pump MUST NOT be used"
If this service letter represents a real SB then people would be nuts
to support these yahoos by buying another Parker pump product.

That would be difficult.

Did you read the line:

"Parker/Airborne ceased the manufacture of Engine-Driven Air Pumps in
February 20002."

In other words, they are saying the last pump made is now beyond it's
service life.

--
Jim Pennino

Remove .spam.sux to reply.

IIRC, those pumps have a six-year life, mostly due to the
plastic drive coupling that goes brittle with age and heat. The carbon
rotor and vanes should be fine, but they're no good if the coupling
doesn't drive them. The coupling was made of plastic so it would shear
rather than lunch the engine if the pump jammed.
We use the Rapco pumps as well as the Tempest. Tempest rebuilds
pumps and puts a visual vane inspection port in the back. Rapco puts
the port in the side of the pump and uses a calibrated plastic gauge
to measure vane wear. Cessna wants pumps replaced at 500 hours/six
years unless they have the port; then they can run beyond the 500
until the vanes are at their limits. In flight school service we never
get a pump near the six-year limit.
I wonder if the drive coupling is available separately?

Dan

Dan