Lets see who can figure this out

[Caelum Deus]

Ok so who knows where the alternate static source opening is in a 172?
Im pretty sure I know where it is. I just want to see if anyone else knows

 

[n57flyguy]

Depends on the model. Please reference the applicable POH for further information.

 

[Boyington]

Just break the VSI glass..... That'll make the flight school happy.

 

[SteveC]

Been almost 10 years since I've flown one. The actual "opening" is in the valve behind the panel I believe.


.

 

[Boyington]

Different models have different locations. In the 1972 "L" model that I trained on, it was under the panel by the pilot's left knee. You had to reach under and find the petcock style valve and turn it to open the alt static.

 

[Roger Roger]

View attachment 26251


Been almost 10 years since I've flown one. The actual "opening" is in the valve behind the panel I believe.


.

That is correct.

Interestingly there was an AD a few years back because a bunch of those Cessna alternate static valves were put together with the part ID sticker covering the opening on the valve. D'oh!

 

[SteveC]

Different models have different locations. In the 1972 "L" model that I trained on, it was under the panel by the pilot's left knee. You had to reach under and find the petcock style valve and turn it to open the alt static.

I remember flying one like that, too.

 

[Roger Roger]

Different models have different locations. In the 1972 "L" model that I trained on, it was under the panel by the pilot's left knee. You had to reach under and find the petcock style valve and turn it to open the alt static.

Also correct, for the aircraft that do not have the valve like what SteveC posted. Aircraft that were not deliver from the factory with an IFR equipment package may not have one at all.

 

[Boyington]

Also correct, for the aircraft that do not have the valve like what SteveC posted. Aircraft that were not deliver from the factory with an IFR equipment package may not have one at all.

I didn't know why they were different. That makes sense.

 

[Caelum Deus]

From what I know, the opening is on the actual knobsteam

 

[MikeD]

Just break the VSI glass..... That'll make the flight school happy.

Even better, do it in the simulator, when given the failure.

 

[Itchy]

Even better, do it in the simulator, when given the failure.

I did that. The stupid Garmin display cracked clear across to the airspeed tape, and I lost the attitude indicator also.

 

[jynxyjoe]

I have a tough time finding the opening. ...

 

[Roger Roger]

http://www.airweb.faa.gov/Regulator...5752900585a24/$FILE/2008-26-10_Correction.pdf

Cessna alternate static AD.

 

[Houston]

Just break the VSI glass.

I knew a fellow who tried to do that and couldn't. We've all heard that advice somewhere in our training, but accomplishing it was much more difficult that discussing it.

In his case, he didn't find out until later where the alternate air lever was located, although at the heart of his problem was an all too cavalier attitude about flight into icing conditions.

 

[Boyington]

I knew a fellow who tried to do that and couldn't. We've all heard that advice somewhere in our training, but accomplishing it was much more difficult that discussing it.

That is why I keep the crash axe handy....never know when you might need to smash something.

 

[gotWXdagain]

I hear that cracking the glass over the VSI tape on the G1000 has the same effect.

 

[CFI A&P]

Here is another piece of useless trivia:

Where is the fourth tie down ring on a C172?

 

[U_of_I_Tweak]

Here is another piece of useless trivia:

Where is the fourth tie down ring on a C172?

On the belly, just aft of the nose gear.

Sent from my DROID RAZR

 

[JordanD]

I have a tough time finding the opening. ...

View attachment 26265

Roll it in flour and.....


Wait, what were we talking about?