REFLECTOR: FUEL FEED & Vents--blinking warning

[Scott Derrick]

I fly above 10,000 ft all the time. thats not that high in my part of 
the country.

Routine flight to SFO is at 12,500 for 4 hours, never had the low sump 
warning. Have flown this ands back at 13,500 a lot of times. Made quite 
a few at 16.500 and 17,500 also.

One hot turbulent day we were getting slammed around for about 1/2 an 
hour,  I was down to 5-7 gallons in the mains, I had the low sump 
warning come on momentairily.... I figured it was air coming in when the 
tank would unport and not being vented very fast because the tanks were 
so low. We were really getting slammed around, continuous moderate, 
occasional severe...

Scott

SlvEgl99 at aol.com wrote:

> I have a question that may be related to venting.  At high altitude 
> (10,000 or so) the sump low fuel warning light occasionally blinks on 
> and off. There is no other indication of low fuel, plenty in the mains 
> and no fuel starvation indications of any sort.
>  
> This has happened only twice in the hours I have flown, and as soon as 
> I return to a lower altitude there is no problem. 
>  
> The sump low fuel sensor is located in the front, top center of the 
> tank, about 1 1/4" below the top in the position called for in the 
> builders manual. I suppose that the higher nose attitude resulting 
> from flight at this altitude may result in this condition, but I would 
> like to hear other thoughts.
>  
> Bob Wood
>
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