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1. 06:44 PM - KAVLICO Sensor SB (Galin Hernandez)
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| Subject: | KAVLICO Sensor SB |
Dynon, AFS and other EFIS manufacturers have issued a Service Bulletin (SB)
concerning KAVLICO pressure sensors. This issue affects the engine
sensor(s) that are used in many other applications within Experimental
aviation.
"*Since 2012, Dynon has supplied Kavlico fluid pressure sensors for use
with its engine monitoring products. These sensors are primarily used to
monitor oil, fuel, and coolant pressure. Dynon has received rare sensor
failure reports that involve fluid leakage. Reports include both drips and
sprays of fuel and oil. Dynon has not received any reports of fuel
exhaustion, oil exhaustion, or fires associated with the reported failures.
Based on review of the sales and fleet data, the likelihood of this
condition occurring is remote.*
https://dynonavionics.com/bulletins/support_bulletin_050620E.php
*Dynon Recommendation: Aircraft owners/operators should consider taking
advantage of this product improvement. Dynon does not specify a timeframe
in which such replacement should be performed.*
*Immediate Action: Ensure pressure sensors are installed in accordance with
guidance in the installation documentation. Do not mount sensors directly
to the engine or other sources of high vibration. Utilize inline fittings
that incorporate a flow restrictor to prevent rapid discharge of fluids in
the event of a failure of any component, including the sensor.*
*Preventive Action: Monitor engine compartment for possible fluid leaks
originating at the pressure sensors. If installing new fluid pressure
sensors, use the updated sensors. Other preventive actions that could be
considered include isolating possible leak sources from sources of
ignition. Such sources include, but are not limited to, fluid junctions,
fittings, hoses, and fluid pressure sensors.*
*Corrective Action:If any signs of fluid leaks (including trace amounts of
residual fluid) are detected.*
* Notify Dynon Technical Support
<https://dynonavionics.com/contact.php> of the failure. If able,
please, retrieve and submit diagnostic data to Dynon
<https://dynonavionics.com/data-datalogs-upload.php> as soon as practicable
after the event. Do not perform this action in flight.*
* Replace the fluid pressure sensor with a new sensor immediately.
Always refer to installation guidance when installing new sensors."*
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