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Date:  2-24-2014
Number of Hours:  1.50
Manual Reference:  
Brief Description:  Static/Pitot leak tests

I needed to test the pitot and static system for leaks.

The pitot and static lines terminate in the cockpit, and will be joined by connectors (photo 2) to the pitot/static lines that are installed in the wing, going to the pitot/static probe. So I'm testing only the integrity of the lines from the instruments to the connectors.

I tied closed one end of a length of latex tubing, and connected the other end to the pitot line (via the new connector in photo 2). With the EFIS turned on, I could squeeze a bunch of the latex tubing (photo 1), pushing the air in the tube toward the EFIS. This simulated the air pressure of moving air in flight. So the airspeed rose (I got the airplane up to 165mph in my basement!). I then stopped at a set airspeed and held the tubing for a full 2 minutes. The airspeed did not change, so that means the system is air tight.

For the static line test I did the same thing but attached to the static line. I was able to hold an altitude, so the static line is air tight as well.

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I made a "barber pole" graphic and laminated it. Using some double-sided tape I installed the barber pole behind the fuel sight line (photo 3). Due to refraction, this makes it easier to see the level of the fuel in the line.
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Note the airspeed of 72mph on the left.

Note the airspeed of 72mph on the left.

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Connectors in pitot and static lines. Zip ties keep the seal tight.

Connectors in pitot and static lines. Zip ties keep the seal tight.

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"Barber pole" behind the fuel sight tube.

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