Dynon Avionics Heated AOA/Pitot Probe - Manual (Page 25)

Mounting and Plumbing
AOA/Pitot Probe and Heated AOA/Pitot Probe Installation Guide Rev. C 4-5
Although the Dynon Avionics AOA/Pitot Probe and Heated AOA/Pitot Probe
incorporate a robust moisture separation and drainage design, the builder/installer
should ensure that the design and installation of the overall AOA / Pitot system
provides positive drainage of moisture from the entire AOA / Pitot / Static system.
PRESSURE CHECK
As explained above, the Dynon Avionics AOA/Pitot Probe / Heated AOA/Pitot Probe incorporate
pin-sized moisture drainage holes in the AOA line and the Pitot line.
Plugging these holes on the exterior of the probe (such as applying tape over them) will not
guarantee a pneumatic seal (although one is sometimes present). The presence of the drain
holes must to be taken into account when doing pressure/leak tests on your AOA / Pitot system
– it may be necessary to temporarily disconnect the probe and plug the AOA and Pitot lines.
HEATED AOA/PITOT PROBE
– HEATER CHECK
A simple test ensures that the Heated AOA/Pitot Probe’s heater is working:

Turn power on to the Heated AOA/Pitot Probe,

Wait one minute for the pitot to allow the Probe to warm to operating temperature,

Briefly (very briefly – it will likely be hot) touch the snout and verify that it is warm.
HEATED AOA/PITOT PROBE – PITOT HEAT STATUS INDICATOR CHECK (IF
INSTALLED)
A simple test ensures that the Heated AOA/Pitot Probe PITOT HEAT STATUS Indicator is
working:

Turn off the switch or circuit breaker powering the Heated AOA/Pitot Probe
o The PITOT HEAT STATUS indicator should illuminate
o If displaying PITOT HEAT STATUS on a Dynon Avionics EMS unit or SkyView EMS
page, the indicator should be Red.
For future reference, before completing the installation, be sure to record the P/N
and S/N of the AOA/Pitot Probe, Heated AOA/Pitot Probe, and Heated AOA/Pitot
Probe controller in the build log or the airframe log.