O&N bladder drains

[Joe Larussa]

Anyone out there replace their wing drains that have bladders? Is that a special part? Looks like it’s installed into the bladder with a hose clamp?

[jetdriven]

F391-18 drain valve from aircraft spruce.   Threads into the NPT threads into the plate in the bottom of the wing. 

[Joe Larussa]

  On 8/29/2019 at 4:01 AM, jetdriven said:

F391-18 drain valve from aircraft spruce.   Threads into the NPT threads into the plate in the bottom of the wing. 

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Is there a trick to getting these out?

[takair]

  On 8/29/2019 at 5:06 AM, Joe Larussa said:

Is there a trick to getting these out?

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Mine came out rather easily, remove the safety wire and lefty loosey.  Are yours stuck?

[Marauder]

  On 8/29/2019 at 5:06 AM, Joe Larussa said:

Is there a trick to getting these out?

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Joe - as Rob mentioned, cut the safety wire and lefty loosey. You will want to replace it with this part: https://www.aircraftspruce.com/catalog/appages/curtisflushmounted_05-04885.php?clickkey=204281

I replaced mine last year. Don't over torque it. You will need to a fuel sealant that doesn't have a hardening agent in it.

[Joe Larussa]

  On 8/29/2019 at 10:47 AM, takair said:

Mine came out rather easily, remove the safety wire and lefty loosey.  Are yours stuck?

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That’s what I thought, just thought there might be something special because I have bladders and there’s a hose clamp.

[jetdriven]

The installation shows the bladder hose clamps to the backside of a metal plate which has a NPT fitting for the valve. . That is riveted to the wing skin.  So you have a valve going into a fitting.  Post a photo.  You really want to be careful here. Because if that fuel drain is simply rubber hose clamp to the bottom of the bladder,  that’s a pretty serious issue

Edited August 29, 2019 by jetdriven

[Joe Larussa]

  On 8/29/2019 at 3:22 PM, jetdriven said:

The installation shows the bladder hose clamps to the backside of a metal plate which has a NPT fitting for the valve. . That is riveted to the wing skin.  So you have a valve going into a fitting.  Post a photo.  You really want to be careful here. Because if that fuel drain is simply rubber hose clamp to the bottom of the bladder,  that’s a pretty serious issue

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Here's a pic.

[jetdriven]

Ok. Unscrew the valve from the plate.  

[carusoam]

Great pic, Joe!

that helps a lot...

Best regards,

-a-