Originally Posted by avrojockey
I agree they "should" be very reliable, but could fail. I went to a class a week ago and the instructor discussed the fact that these pumps could and have failed in the closed position (blocking fuel flow). Without some sort of bypass and if plumbed in series, that would obviously stop fuel flow and cause engine stoppage, even if you also have a mechanical pump plumbed in.
Has anyone plumbed in some sort of bypass that would allow bypassing the Facet pump, if failure was to occur during flight?
The pump for my RV12 is a $44 part. Considering that I use mogas with ethanol, I'm thinking it would be prudent to replace the pump every few years during Condition Inspection just to make sure I'm not slowly building up some sort of gunk/debris in the pump that could cause it to fail and block fuel flow. $44 for such a critical part is pretty cheap piece of mind insurance.
Van's RV-12 #120566 - ELSA - N49DD
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