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Old 10-27-2021, 01:47 PM
Felix1973's Avatar
Felix1973 Felix1973 is offline
Join Date: Feb 2020
Location: Miami
Posts: 15
Lightbulb Fuel tank leak? 🤯

Hello fellow RV-flyer:

I would like to tap into your experience building an RV12 since mine is SLSA. I noticed some fuel smell in the cockpit a couple of days ago and found this today:

Could you share your opinions about the root cause and possible remedies?
Thanks a lot in advance!

Last edited by Felix1973 : 10-28-2021 at 02:25 PM. Reason: added a photo
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Old 10-27-2021, 02:14 PM
Bob Y Bob Y is offline
Join Date: Jul 2017
Location: Piedmont, SC
Posts: 302

Likely from overfilling the tank and fuel leaked around the rubber hose. Happened to me on my iS too. I replaced the standard worm-gear clamps with these.

Makes a much better seal. Youíll have to run this mod past Vanís though since yours is an S-LSA.
Bob Y - builder 12iS E-LSA
N569TT first flight 2/9/2020
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Old 10-27-2021, 02:36 PM
Piper J3's Avatar
Piper J3 Piper J3 is offline
Join Date: Nov 2014
Location: Hinckley, Ohio
Posts: 2,566

I used Stainless Steel T-Bolt Hose Clamps available at auto part store...
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Jim Stricker - EAA #499867
PPL/ASEL 1970 - Sport Pilot since 2007
80 hrs Flying Aeronca Chief 11AC N86203
1130 hrs Flying 46 Piper J-3 Cub N6841H
Bought Flying RV-12 #120058 Oct 2015 with 48TT - Hobbs now 750

LSRM-A Certificate 2016 for RV-12 N633CM
Special Thanks... EJ Trucks - USN Crew Chief A-4 Skyhawk
MJ Stricker (Father - CFI) - USAAF 1st Lt. Captain B-17H
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Old 10-27-2021, 02:37 PM
DHeal DHeal is offline
Join Date: Sep 2006
Location: Windsor, California
Posts: 1,006

Could be overflow spillage during refueling, worn or damaged rubber connector hose, or loose hose clamps. My first step would be to clean up the leak area, snug up the hose clamps a bit, and then monitor area for any new leakage.
David Heal - Windsor, CA (near Santa Rosa)
EAA #23982 (circa 1965) - EAA Technical Counselor and Flight Advisor; CFI - A&I
RV-12 E-LSA #120496 (SV w/ AP and ADS-B 2020) - N124DH flying since March 2014 - 1,080+ hours (as of Oct 2021)!
VAF donation through June 2022.
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Old 10-27-2021, 09:54 PM
RFSchaller RFSchaller is offline
Join Date: Oct 2010
Location: Phoenix, AZ
Posts: 3,165

Dumb question from me: have you tried tightening the clamps?
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Old 10-28-2021, 02:20 AM
Mich48041 Mich48041 is offline
Join Date: Apr 2008
Location: Riley TWP MI
Posts: 3,237

Disassemble and apply EZ Turn (fuel lube) to the mating parts.
Joe Gores
RV-12 Flying
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Old 10-28-2021, 11:04 AM
BruceW BruceW is offline
Join Date: Aug 2005
Location: Elk Grove, CA
Posts: 190

Remedy; Wipe off, keep flying. (its not that much)
Bruce W
RV-7 QB (500+ hours)
RV-14 in waiting
Elk Grove, CA
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Old 10-28-2021, 12:00 PM
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n82rb n82rb is offline
Join Date: Jan 2007
Location: fort myers fl
Posts: 1,091

Originally Posted by BruceW View Post
Remedy; Wipe off, keep flying. (its not that much)
wrong answer, if he is smelling fuel in the cockpit the solution is to find the source and fix it. never fly with a know fuel leak, especially in the cockpit.

bob burns
RV-4 N82RB
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Old 10-29-2021, 09:50 AM
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DaleB DaleB is offline
Join Date: Sep 2012
Location: Omaha, NE (KMLE)
Posts: 2,331

Originally Posted by Mich48041 View Post
Disassemble and apply EZ Turn (fuel lube) to the mating parts.
That worked for ours as well.

Omaha, NE
RV-12 # 222 N980KM "Screamin' Canary" (bought flying)
Fisher Celebrity (under construction)
Previous RV-7 project (sold)
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Old 10-29-2021, 02:52 PM
PilotBrent PilotBrent is offline
Join Date: Dec 2011
Location: Hackettstown, NJ
Posts: 475

I'd also remove the rubber collar and inspect the inner surface. On one of my annuals, I found the rubber has partially deteriorated where in contact with fuel. Easy, cheap to replace with newer more flexible one. (and check the tightness of the clamps)
Brent Connelly
Hackettstown, NJ
RV-12, N913BC
2021 VAF Donation, please make yours too!

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