Home > VansAirForceForums

- Donate yearly (please).
- Advertise in here!

- Today's Posts | Insert Pics

Old 05-08-2018, 06:03 PM
Aussieflyer Aussieflyer is offline
Join Date: Jan 2015
Location: Redcliffe, Queensland, Australia
Posts: 56
Default Fuel Flow transducer damage

My 14A is 17 months old with 164 hours on the hobbs. My red cube fuel flow meter has just been replaced. The fuel flow meter is mounted as per instructions, that is very close to the exhaust pipe. The transducer failed with burnt and damaged wiring at the tope of the cube. It indicates to me that the location for installation may be compromised by the location to the exhaust pipe. Albeit the heat shield is fitted to minimise heat affects, this appears not to be sufficently effective.

Has anyone else had this problem?

I am using Garmin G3X and the UMA red fuel cube in my aircraft. For those who are following, it may be useful to consider installing the fuel cube somewhere else further away from the exhaust pipes. This would mean changing the lengths of fuel hose but this may ensure longevity of your fuel flow transducer.

Reply With Quote
Old 05-08-2018, 06:09 PM
rvbuilder2002 rvbuilder2002 is offline
Join Date: Jul 2005
Location: Hubbard Oregon
Posts: 7,958

The prototype RV-14A is approaching 1000 hrs using the original flow transducer in the plans specified location (and using the specified heat shield).

Have you look for evidence of a leaking exhaust flange gasket?
Any opinions expressed in this message are my own and not necessarily those of my employer.

Scott McDaniels
Hubbard, Oregon
RV-6A (aka "Junkyard Special ")
Reply With Quote
Old 05-08-2018, 06:58 PM
TS Flightlines TS Flightlines is offline
Join Date: Apr 2010
Location: Ridgeland, SC
Posts: 2,195

There are a LOT of RV14's with the transducer in the stock location, and this is the first I've heard of this happening. If this is correct, the wiring is farther away than the supply hose---so even though its firesleeved, there may be some heat indications on the very edge of the end of the sleeve (even though end dipped) or slight discoloration of the sleeve band.

Take a pic of the install so we can see whats going on.

Tom Swearengen, TS Flightlines LLC, AS Flightlines
Joint Venture with Aircraft Specialty
Teflon Hose Assemblies for Experimentals
Proud Vendor for RV1, Donator to VAF
RV7 Tail Kit Completed, Fuse started-Pay as I go Plan
Ridgeland, SC,
Reply With Quote
Old 05-12-2018, 12:47 AM
Dustyone Dustyone is offline
Join Date: Oct 2012
Location: Brisbane,Austalia
Posts: 128
Default Photos of damaged sensor and location

Posting photos for Aussieflyer
Heat Damaged Fuel Cube,

and installation as per factory instructions,

Ashley Miller
RV-10 #40597
Airflow Systems Air-Con
VH-XTE 500hrs +
Photos :
Reply With Quote
Old 05-14-2018, 03:09 PM
Arablenz Arablenz is offline
Join Date: Dec 2014
Location: South Island ,New Zealand
Posts: 50

Would be very interested to know the outcome of this thread? Looks on the face of it , that the cube has been hot and then melted the wiring coming out of it , unless there is an electrical issue.
Reply With Quote

Thread Tools Search this Thread
Search this Thread:

Advanced Search
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

vB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Forum Jump

All times are GMT -6. The time now is 02:23 PM.

The VAFForums come to you courtesy Delta Romeo, LLC. By viewing and participating in them you agree to build your plane using standardized methods and practices and to fly it safely and in accordance with the laws governing the country you are located in.