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just bought an inspection camera, and I want to check insulation.


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Posted

what's the easiest way to do it?  take a side panel down or drop the one piece belly?  I've seen a few references to sb208b in the logs, but nothing that says the insulation was changed.  The interior was replaced in the mid 90's, well after the SB came out, but I don't want to assume.  I'd feel better if I saw it myself.  I'm figuring if I drop the belly, I could check the rear spar for cracks (SB217).

Posted

I would start by removing the pilot side ashtray. If you see aluminum foil covered insulation it has been done. Pink fiberglass it hasn't.

you can get a better look by removing the side panel but they crack very easily if they haven't been replaced.

Posted

I removed my ashtray without redoing the interior. There's an ashlight there now:

http://www.aircraftspruce.com/catalog/pspages/ashlight_standard.php?clickkey=10458

Love it at night, great light for the panel and my kneeboard.

Good luck with an easy inspection. Maybe you can remove several screws along the top edge of the side panel and gently flex it enough to get the camera behind it. Depends, of course, on the size of the camera. We have a fancy bore scope at work just a little over 1/8" diameter; I'll never buy one, it cost more than a GTN 750 with installation.

Let us know how it goes and what you find.

Posted

I removed my ashtray without redoing the interior. There's an ashlight there now:

http://www.aircraftspruce.com/catalog/pspages/ashlight_standard.php?clickkey=10458

Love it at night, great light for the panel and my kneeboard.

Good luck with an easy inspection. Maybe you can remove several screws along the top edge of the side panel and gently flex it enough to get the camera behind it. Depends, of course, on the size of the camera. We have a fancy bore scope at work just a little over 1/8" diameter; I'll never buy one, it cost more than a GTN 750 with installation.

Let us know how it goes and what you find.

 

thanks, Hank.  Mine's just an el cheapo from Home Depot.  Cost me $79.  Gotta keep up the frugal mooney image.  

Posted

I removed my ashtray without redoing the interior. There's an ashlight there now:

http://www.aircraftspruce.com/catalog/pspages/ashlight_standard.php?clickkey=10458

Love it at night, great light for the panel and my kneeboard.

Let us know how it goes and what you find.

Glad you mentioned that Hank. I just bought an Ashlight and was wondering if they were any good. Just received it today and was going to install it tomorrow morning. Don't fly much at night, but last flight a couple of weeks ago could hardly see the kneeboard to write down a clearance.

Posted

Rob, didn't realize my favorite Orange Big Box carries borescopes. May have to go check it out. Not sure if I can borrow the fancy Olympus from work at annual, or if I would be comfortable doing so if permitted, that's a chunk of change.

Posted

Hank, you made me take a second look, and I found a seam between panels.  Pried it open a little and saw the newer insulation.  That was nice to see.

 

insulation_zps28895619.jpg

  • 3 weeks later...
Posted

 Pink fiberglass it hasn't.

you can get a better look by removing the side panel but they crack very easily if they haven't been replaced.

 

It was yellow fiberglass in my Mooney, not pink....must be a gender thing.  :P

 

There are several options to replace the original fiberglass with, but the important thing is to choose an insulation-sound absorbent material that will not hold moisture against the steel structural members.

 

Rob, with all your dental cameras, I'm surprised you didn't just use one of those for inspecting your Mooney!

Posted

Is this the stuff or is there a specific kit that can be purchased?

 

http://www.aircraftspruce.com/pages/cs/insulation/orcotekstrip.php

you can buy it with or without the adhesive.  I used the non adhesive so I can remove and look behind it when desired.  Use poster paper for templates and trim until it fits correctly.  Then transfer pattern to material and cut.

http://www.aircraftspruce.com/catalog/appages/soundproofinstall.php?clickkey=7630

 

http://www.aircraftspruce.com/catalog/appages/supersoundproofsheet.php

Posted

Jim- that is NOT the stuff. That is made out of fiberglass which gets removed as one part of Service Bulletin 208b.

The foam you want is burn tested closed cell foam (won't absorb water).

This stuff?    http://www.aircraftspruce.com/catalog/cmpages/divinycellfoam.php?clickkey=9933

 

if so how thick or does it vary on where it is put?

Posted

you can buy it with or without the adhesive.  I used the non adhesive so I can remove and look behind it when desired.  Use poster paper for templates and trim until it fits correctly.  Then transfer pattern to material and cut.

http://www.aircraftspruce.com/catalog/appages/soundproofinstall.php?clickkey=7630

 

http://www.aircraftspruce.com/catalog/appages/supersoundproofsheet.php

 

Definitely without the adhesive for most of the job.

 

With adhesive, it won't slide behind the structural steel and into tight areas.  I just used a spray adhesive where I needed "sticky".

Posted

you can buy it with or without the adhesive.  I used the non adhesive so I can remove and look behind it when desired.  Use poster paper for templates and trim until it fits correctly.  Then transfer pattern to material and cut.

http://www.aircraftspruce.com/catalog/appages/soundproofinstall.php?clickkey=7630

 

http://www.aircraftspruce.com/catalog/appages/supersoundproofsheet.php

This may not be exactly what LASAR sells, but it definitely meets the intent of the SB, even if it is not the exact part number. It works great, is burn certified, and cheaper.

Posted

Oh, BTW, I like the 1/2" stuff the most. It seems to me to be the best balance between weight, cost, ease of installation, and effectiveness of noise reduction and insulation properties.

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