Today's Message Index:
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1. 07:10 AM - 640 Carb Heat (steveadams)
2. 12:56 PM - Re: Look doors Mecanisms (steveadams)
Message 1
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Every time I find a maintenance issue, I try and post it for those few 640 builders
out there. The other day I was landing and pulled the carb heat, which pulled
about 6 inches out of the panel. I landed, and thinking the cable had broken,
removed the cowl to take a look. I didn't take any pictures, but the bolt
attaching the cable to the arm that controls the carb heat flapper had worn all
the way through the arm and pulled out. On closer inspection, the bolt had
also been worn so only about 30% of the bolt cross section was remaining. I replaced
the flapper arm so I could keep flying, but am looking at the design and
trying to come up with a fix. I think I will weld on a thicker and wider arm
so I can drill a larger hole and insert a bearing around the bolt which should
make it hold up a bit better. The cabin heat uses a similar design and control
cable, but there is no wear at that connection.
Steve Adams
Read this topic online here:
http://forums.matronics.com/viewtopic.php?p=183286#183286
Message 2
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Subject: | Re: Look doors Mecanisms |
seattle wrote:
> For cooling, do you taxi with the doors up?
No, even with the engine idling they would at the least be damaged and likely torn
off. They are sturdy when closed, and big enough to make getting everything
and everybody in when opened, but are just not designed to be open and flapping
in the breeze.
Read this topic online here:
http://forums.matronics.com/viewtopic.php?p=183337#183337
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