Dico:  My favorite way to find leaks on the ground is to fire up a good Monte Christo and have someone outside looking for smoke.

Doesn't always work, but at least you get to enjoy a good cigar.

Cigars can be used for navigation as well.  You have to do a route in VFR conditions a few times, and figure out just where you are on the cigar before it is time to descend.  With practice, at the right point on the cigar, you can descend through the deck to your desired air patch.

John


On Sep 12, 2011, at 6:34 PM, Dico Reijers wrote:

Hi Brent,

Thanks for your reply on the IV-P pressurization.  I found it quite helpful and informative as I figure out the pressurization system.  

From my limited testing so far (flying at 10-12k), I've noticed that the pressurization isn't linear.  At 10k my cabin altitude (according to the indicator) is 5k and the PSI is perhaps 2 or 2.5 differential...  since the POH suggests a 8000' cabin at FL220... I am surprised that I can climb an additional 12k and have the cabin altitude only rise an additional 3k.  I was flying at 31" / 2500.

How do you check for leaks on the ground?

thanks,

Dico