Replacing Skylights

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7133
Posts: 17
Joined: Tue May 01, 2018 7:00 am
Location: Watts Bridge Memorial Airfield
Name: Michael Sheppard
Aircraft Type: 1948 Cessna 140
Occupation: Mechanical and Structural Designer.
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Replacing Skylights

Post by 7133 » Tue Mar 24, 2020 1:20 am

Looking at replacing the Skylights in my 140.
What is the easiest way to do it?
Can we de-rivet one half of the surround and slide the old plastic out and new in, rather than remove all of the rivets?
What type of material is the best ie Acrylic, Polycarbonate?
Any suggestions appreciated.
Michael

8474
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Joined: Sat May 25, 2019 12:08 pm
Location: Saskatchewan
Name: Blaine F
Aircraft Type: C140A
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Re: Replacing Skylights

Post by 8474 » Tue Mar 24, 2020 9:05 am

I can't give you any advise on replacing the skylights themselves, but I just finished replacing the headliner which you will have to remove to get the skylights out. My headliner was missing when I bought the airplane as the skylights had been replaced. The new skylights had been installed using bolts, not rivets if that is any help. Let me tell you that was a huge job replacing the headliner. I followed what Lorraine Morris shows in her video and the biggest issue is making up the aluminum pieces that surround the skylights, that was literally a full day of trial and error to get them to fit and even then I didn't get it anywhere as neat as Lorraine did. I ended up having to glue it up in places.

So having said all that, if your headliner is in good shape and you don't need to replace it then maybe you can drop it down to gain access to the skylights and then re-install it. If you are considering this I would highly recommend buying Lorraines DVD.

2356
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Location: Gainesville, TX
Name: George Bryant
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Re: Replacing Skylights

Post by 2356 » Tue Mar 24, 2020 9:57 am

Acrylic is the best. Lexan yellows and scratches easily.

6298
Posts: 159
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Location: California
Name: Randy Thompson
Aircraft Type: Cessna 140
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Re: Replacing Skylights

Post by 6298 » Tue Mar 24, 2020 10:20 am

I have replaced them on a few and removing half of the rivets works well. I agree with the Acrylic. If you spill fuel on the Lexan it will crack and you will need to do it again.
Randy Thompson A&P IA Pilot
Hold STC SA547EA for installation of O-200 engine in Cessna 120/140 and 140A"s
Overhaul small Continentals

7133
Posts: 17
Joined: Tue May 01, 2018 7:00 am
Location: Watts Bridge Memorial Airfield
Name: Michael Sheppard
Aircraft Type: 1948 Cessna 140
Occupation: Mechanical and Structural Designer.
Contact:

Re: Replacing Skylights

Post by 7133 » Tue Mar 24, 2020 1:39 pm

Thanks for the replies.
I am glad that removing half the rivets works!
Acrylic it is.
I have done the headliner before and have Lorraine's DVD so all good there.
Michael Sheppard
1948 Cessna 140 VH-TMO

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