Pitot heaters

[WHarder]

I have started working on a C337 that has a pitot leak. It apparently had 2 ASIs and 2 pitot sytems, left and right. My service manual only shows one in the left strut and no option for a right pitot.
Is there an option for the right strut and can anyone provide me with a part number for the heater pad/seal itself?

The aircraft was owned by "Alby Mangles" who did movies of his exploits and the aircraft has had many cameras and radios fitted at one stage or another. It is currently flying low sorties as shark spotter in Australia.

[Ed Coffman]

I had the same question last spring and Tom Carr of Cessna Pilots Association provided me with the answer which I quote here to you.

"Ed,
The breakdown of the heated pitot head is as follows; the complete
assembly is part number 1500118-4, list price $911; the thermostat is
part number 430-863, list price $18.12; and the heating element is part
number 665-3645-3, list price $335.
Cessna Multi-engine Service Bulletin, ME75-06 details the
installation of the heated pitot head into the strut fairing and calls
for a light coat of RTV-102 to be applied to the pitot head and inside
surface of the strut fairing before the retaining screws are
installed. This is to help ensure a heat transfer to the fairing. The
heating element gets very hot and needs the fairing to help dissipate
the heat. Be careful when testing the heater without it being attached
to the fairing. It can overheat very fast and fail if left on too long.
Tom Carr, CPA Tech Rep mailto:tom.carr@cessna.org"

Hope that helps.

Ed Coffman
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[WHarder]

Thanks for the info. I will see if we have a copy of the SB. The coating of RTV will stop the leak as well as transfere the heat. The only thing is to ensure that the pitot holes are kept clear.

Wayne Harder