I had to replace the left forward door post from the carry-through spar down to the forward gearbox bulkhead. The bottom end of the post has several layers and several of the large rivets around the bolt hole are flush on both sides so the the fork of the bottom end of the wing strut can fit around it.
Attached is a picture of the forward side of the bottom of the post, with most of the rivets removed.
My assumption is that these rivets are something like AN426AD-6 flush rivets that are bucked down so the shop head fills the countersink, then anything that sticks out is shaved or filed off.
Has anyone else replaced these double flush rivets?
Double flush rivets at the bottom of the door post
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chriscrewdson
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- Name: Chris Crewdson
- Location: Forest Grove, OR
- Aircraft Type: Cessna 120
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Double flush rivets at the bottom of the door post
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6183
- Posts: 393
- Joined: Tue May 01, 2018 7:00 am
- Name: Mike Smith
- Location: Florida
- Aircraft Type: 140A (2) 1949 & 1950
- Occupation-Interests: Retired aerial power line patrol pilot for Gulf Power Co. CFIA, CFII, MEI
120-140 Assoc. Florida Rep. N9633A & N9688A - Contact:
Re: Double flush rivets at the bottom of the door post
Sent you a PM for a contact to help you.