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Tail feather struts RUST inspection

 
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210TC
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Location: New Braunfels, Tx

PostPosted: Thu May 17, 2007 1:18 pm    Post subject: Tail feather struts RUST inspection Reply with quote

I pulled my rear struts today and found a white substance inside the lower attachment's welded to the airframe. The white stuff was hard not silicone.
I found no evidence of rust in this area.
DO I NEED TO REMOVE THIS WHITE STUFF TO CHECK FOR RUST?
Never been on floats or near salt water.
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David
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maules.com
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PostPosted: Thu May 17, 2007 7:24 pm    Post subject: Reply with quote

There is a service letter or bulletin on www.mauleairinc.com addressing that issue with description of the inspection. Best to replace the tailstrut bolts at this time. Also replace the bolts holding steering horn to rudder which loosen and wallow out the holes, and the rudder cable clevis bolts which wear.
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Jeremy
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noe flightrisk



Joined: 21 Nov 2010
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Location: Norcal

PostPosted: Sat Jan 14, 2012 5:21 pm    Post subject: Reply with quote

I removed my M7-235 tail strut bolts today to inspect the struts, but can't seem to slide the struts far enough in either direction to remove them. Do I need to remove anything else, or is there a trick to it?
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PostPosted: Sat Jan 14, 2012 6:32 pm    Post subject: Reply with quote

If you remove bolts at both ends, the strut should slide further onto the lower attach and by lifting up the stabiliser outboard, the strut usually clears the upper attach. If not, then you will have to disconnect the elevators etc but hopefully not.
Do check the hinge bushings and pins for wear. The left outboard is usually first to go because of prop wash.
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PostPosted: Sun Jan 15, 2012 1:52 pm    Post subject: Reply with quote

Thanks, Jeremy, I'll give that a try. You are truly a font of indespensable knowledge!
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StuporRocket
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PostPosted: Sun Jun 09, 2019 3:04 am    Post subject: Reply with quote

So what is the white stuff in the lower strut attach tubes (welded to the lower longerons) for the horizontal Stab? Our '77 M-5 project also has this material inside the tubes. Was it put there intentionally? I don't believe it accumulated above there into the struts themselves but I'll check when I get out to the airport this afternoon.
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PostPosted: Sun Jun 09, 2019 3:56 am    Post subject: Reply with quote

Before the service instruction came out it was bondo type material but eventually it loses contact with the metal tube and water gets inside the tube and corroded the weld from inside.
The fix is described in the service instruction. Get the bondo out, clean, de-corrode, prep with anticorrosion and refill with silicone making sure it binds to cleaned metal.
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StuporRocket
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PostPosted: Sun Jun 09, 2019 11:26 pm    Post subject: Reply with quote

Thank you, Jeremy. I'll read it thoroughly and get it done.
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