1960 PA-24-250 Alternate Static Source

by **William Hughes** » Thu Aug 28, 2014 11:52 pm

This aircraft is flying in Canada and I am intent on adding an alternate static source with nice clean paperwork. I have been unsuccessful in finding any kind of certified kit or what have you for this aircraft. Any thoughts on this?

by **N3322G** » Fri Aug 29, 2014 2:48 am

Hmmm. I have seen this on other Comanches but don't know how they got it.

by **JIMICS2452** » Fri Aug 29, 2014 1:28 pm

Ours was done years ago as a minor modification. Log book entry only. The AP tapped into the static line and put a fuel drain valve in the panel labeled "Static Vent" This is a US airplane.

by **Charles Schefer** » Sun Aug 31, 2014 1:59 pm

I have one on my 1968 "B" model Twin. I thought (assumed) it was standard. It's a small valve located just under the lower edge of the switch panel to the left of the throttle quadrant.

- Charles

by **Andres Darvasi** » Wed Sep 03, 2014 7:21 pm

My aircraft (1969 260C) has one on the lower right side of the throttle quadrant, seems to be original.
See pictures.
I don't know if it works or not, because in my previous aircraft when you opened or closed it the VSI needle moved, and this one doesn't do a thing!

by **JIMICS2452** » Thu Sep 04, 2014 11:59 am

Andres, If the VSI or altimeter do not jump a little it is not working. It could be always closed or always open.

by **Andres Darvasi** » Thu Sep 04, 2014 12:27 pm

That's what I figured Jim, ai will have it checked at annual
Regards
Andres

by **JIMICS2452** » Thu Sep 04, 2014 4:46 pm

I assumed the test was done while airborne.

by **Andres Darvasi** » Thu Sep 04, 2014 4:48 pm

No, it was down as part of the pre flight while on the ground!

by **JIMICS2452** » Fri Sep 05, 2014 4:43 pm

I needs to be done while in flight. It is the speed of the aircraft that creates the pressure difference between the external static ports and the internal aux static port.

by **Andres Darvasi** » Fri Sep 05, 2014 4:46 pm

Makes sense and I will try in flight. Why did it work in the Cessna 210 and 182 on the ground? Different system?

by **VANBLADEREN** » Sat Sep 13, 2014 3:15 am

If the VSI or Altimeter does not move when you open there alternate static, then it could also mean that you have a serious static leak. It is unlikely that the alternate static source is not working, but stranger things have happened,

Regard

jvb

by **Mark Anderson** » Sun Sep 14, 2014 3:01 am

William, I have a 61 250 and looked into this before. There is no STC that I found; the best I could tell it would need to be installed under with a 337.

Mark Anderson

by **William Hughes** » Sun Sep 14, 2014 11:42 pm

Thanks Mark, appreciate the info.

1960 PA-24-250 Alternate Static Source

1960 PA-24-250 Alternate Static Source

Re: 1960 PA-24-250 Alternate Static Source

Re: 1960 PA-24-250 Alternate Static Source

Re: 1960 PA-24-250 Alternate Static Source

Re: 1960 PA-24-250 Alternate Static Source

Re: 1960 PA-24-250 Alternate Static Source

Re: 1960 PA-24-250 Alternate Static Source

Re: 1960 PA-24-250 Alternate Static Source

Re: 1960 PA-24-250 Alternate Static Source

Re: 1960 PA-24-250 Alternate Static Source

Re: 1960 PA-24-250 Alternate Static Source

Re: 1960 PA-24-250 Alternate Static Source

Re: 1960 PA-24-250 Alternate Static Source

Re: 1960 PA-24-250 Alternate Static Source

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