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Fuel Tank Bulletin
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George McNutt

Joined: 09 Jan 2006
Posts: 30

Posted: Sun Feb 26, 2006 10:57 pm Post subject: Fuel tank bulletin

Hi Donald



Thanks for sharing that information.

Reading about pipe flares today and found that over tightening can cause 

damage to the tube possibly causing failure, also cracks and deformities 

in a flare are not acceptable.

Two questions for you -  did the investigation find that the AN 818 nut 

came completely off the bulkhead fitting allowing the pickup tube to 

drop off, or had the nut  just loosened allowing the fuel pump to suck air?

Was there any previous symptom of a fuel flow problem?



Thanks,



George in Langley BC



 



 	  Quote: 	
		  

There have been at least 2 accidents due to the loose flare nut fitting.  I 

totaled my RV-6 31/2 years ago due to this problem.  There was 6.5 gallons 

left in the tank, not 3.5. I informed Vans about it and never received a 

reply.  There was a short note in the RVator 2-3 years ago addressing this 

problem.  It was done by a contributor, not Van's staff. I prosealed the nuts 

on my current RV-9.

Don Piermattei

RV-9 90411

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Ed Anderson

Joined: 10 Jan 2006
Posts: 475

Posted: Mon Feb 27, 2006 5:01 am Post subject: Fuel tank bulletin

Yes, when I informed them of my finding the Flop Tube having fallen off - 

they really did not seem interested.  I presume this comes from the fact 

that there are hundreds/thousands of Rv's who have never had the problem (at 

least - not yet).  Did you have extended fuel capacity in your Rv-6?  I 

drained the tank immediately after the incident (within 30 minutes) and the 

fuel remaining was 3.5 gallons in my case (Rv-6A).



Ed



Ed Anderson

Rv-6A N494BW Rotary Powered

Matthews, NC

eanderson(at)carolina.rr.com

 	  Quote: 	
		   

 <dlpier(at)lamar.colostate.edu>



 There have been at least 2 accidents due to the loose flare nut fitting. 

 I

 totaled my RV-6 31/2 years ago due to this problem.  There was 6.5 gallons

 left in the tank, not 3.5. I informed Vans about it and never received a

 reply.  There was a short note in the RVator 2-3 years ago addressing this

 problem.  It was done by a contributor, not Van's staff. I prosealed the 

 nuts

 on my current RV-9.

 Don Piermattei

 RV-9 90411



 Donald L. Piermattei DVM, PhD

 5000 E County Rd 92

 Carr, CO 80612

 970/568-9047

 Fax 970/568-7279

- The Matronics RV-List Email Forum -

Use the List Feature Navigator to browse the many List utilities available such as the Email Subscriptions page, Archive Search & Download, 7-Day Browse, Chat, FAQ, Photoshare, and much more:

http://www.matronics.com/Navigator?RV-List

_________________
Ed Anderson
Rv-6A N494BW Rotary Powered
Matthews, NC
eanderson@carolina.rr.com

khorton01(at)rogers.com
Guest

Posted: Mon Feb 27, 2006 10:58 am Post subject: Fuel tank bulletin

The flare nut for the regular fuel pickup is higher than the one for  

the inverted fuel pickup.  So it is reasonable to assume that fuel  

remaining after the failure would be greater.



Kevin Horton



On 27 Feb 2006, at 07:41, Ed Anderson wrote:



 	  Quote: 	
		   

 <eanderson(at)carolina.rr.com>

  Yes, when I informed them of my finding the Flop Tube having  

 fallen off -

 they really did not seem interested.  I presume this comes from the  

 fact

 that there are hundreds/thousands of Rv's who have never had the  

 problem (at

 least - not yet).  Did you have extended fuel capacity in your  

 Rv-6?  I

 drained the tank immediately after the incident (within 30 minutes)  

 and the

 fuel remaining was 3.5 gallons in my case (Rv-6A).



 Ed



 Ed Anderson

 Rv-6A N494BW Rotary Powered

 Matthews, NC

 eanderson(at)carolina.rr.com

> 

> <dlpier(at)lamar.colostate.edu>

>

> There have been at least 2 accidents due to the loose flare nut  

> fitting.

> I

> totaled my RV-6 31/2 years ago due to this problem.  There was 6.5  

> gallons

> left in the tank, not 3.5. I informed Vans about it and never  

> received a

> reply.  There was a short note in the RVator 2-3 years ago  

> addressing this

> problem.  It was done by a contributor, not Van's staff. I  

> prosealed the

> nuts

> on my current RV-9.

> Don Piermattei

> RV-9 90411

- The Matronics RV-List Email Forum -

Use the List Feature Navigator to browse the many List utilities available such as the Email Subscriptions page, Archive Search & Download, 7-Day Browse, Chat, FAQ, Photoshare, and much more:

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dlpier(at)lamar.colostate
Guest

Posted: Mon Feb 27, 2006 11:44 am Post subject: Fuel tank bulletin

Hi Donald



Thanks for sharing that information.

Reading about pipe flares today and found that over tightening can cause 

damage to the tube possibly causing failure, also cracks and deformities in a 

flare are not acceptable.

Two questions for you - did the investigation find that the AN 818 nut came 

completely off the bulkhead fitting allowing the pickup tube to drop off, or 

had the nut just loosened allowing the fuel pump to suck air?

Was there any previous symptom of a fuel flow problem?



The pick up tube was completely loose. There were no previous indications as I 

apparently had never let that tank get that low in 175 hours of operation.



Donald L. Piermattei DVM, PhD

5000 E County Rd 92

Carr, CO 80612

970/568-9047

Fax 970/568-7279

- The Matronics RV-List Email Forum -

Use the List Feature Navigator to browse the many List utilities available such as the Email Subscriptions page, Archive Search & Download, 7-Day Browse, Chat, FAQ, Photoshare, and much more:

http://www.matronics.com/Navigator?RV-List

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