-----Original Message-----
From: gt ]
Posted At: Sunday, August 13, 2006 10:41 AM
Posted To: rec.aviation.piloting
Conversation: Vacuum pump STC
Subject: Vacuum pump STC

I would like to make my 1960 Cessna 172A IFR. Currently, I have only
venturi vacuum. My A & P stated that as there is no STC for a vacuum
pump intall, I need a form 337 field approval...I think it is form
337,
I could be wrong on that. Does anyone have information relating to
STC's and field approvals for vacuum pump installations on a
Continental 300-C?

When I converted my Funk B-12 from a 15A generator to a 60A alternator,
all we had to do was file a form 337 and make the appropriate logbook
entries to show that we had complied with the similar installation on
the Cessna 150. (It also uses the O-200 / C85 engine core.)

I also built up a new bus and electrical sub-system to handle the
additional load.

I would expect you could do something similar.