28 Mar 2024, 12:23 [ UTC - 5; DST ]
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Post subject: Cirrus fails inspection because paint too thick? Posted: 14 Sep 2017, 21:36 |
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Joined: 08/01/11 Posts: 6689 Post Likes: +4354 Location: In between the opioid and marijuana epidemics
Aircraft: 182, A36TC
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Heard recently about a Cirrus that was repainted and was for sale. Failed prepurchase inspection due to paint being too thick.
Never heard of this.
Thick paint somehow overinsulate the composite structure leading to failure in the heat?
_________________ Fly High,
Ryan Holt CFI
"Paranoia and PTSD are requirements not diseases"
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Post subject: Re: Cirrus fails inspection because paint too thick? Posted: 14 Sep 2017, 22:24 |
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Joined: 05/06/14 Posts: 6540 Post Likes: +7391 Company: The French Tradition Location: KCRQ - Carlsbad - KTOA
Aircraft: 89 A36 TN, 78 Tiger
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When I repainted my grumman, my mechanic ended up doing a complete weight and balance, had to remove the elevators to weight them separately... It was a big deal. Ended up costing me quite a bit for that annual. If you think about it, paint is heavy, so yes, it makes sense. Specially aviation paint, that is actually more like an epoxy that cures, so the weight remains. If you use 5 gallons of paint, guess what, that is close to 30 lbs extra of static weight, in weird places that could change the CG. So yes, it is important. And we know how fussy those clown planes are with stalls and spins.
_________________ Bonanza 89 A36 Turbo Norm Grumman Tiger 78
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Post subject: Re: Cirrus fails inspection because paint too thick? Posted: 14 Sep 2017, 22:33 |
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Joined: 09/12/11 Posts: 3337 Post Likes: +794 Company: RPM Aircraft Service Location: Gaithersburg MD KGAI
Aircraft: Mooney 201, A320
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Username Protected wrote: Heard recently about a Cirrus that was repainted and was for sale. Failed prepurchase inspection due to paint being too thick.
Never heard of this.
Thick paint somehow overinsulate the composite structure leading to failure in the heat? Or the wrong color. Dark colors, even darker whites, can overheat the composites.
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Post subject: Re: Cirrus fails inspection because paint too thick? Posted: 15 Sep 2017, 12:24 |
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Joined: 11/29/14 Posts: 37 Post Likes: +61
Aircraft: Cirrus SR22
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Username Protected wrote: It very well could be due to lightning strike requirements. Too much paint over a conductive layer (I'm not sure what they use) prevents the strike from flowing quickly enough to prevent structural damage. Paint is resistive...which is bad in this instance! If the strike lingers it will blow right through the composite structure. That is especially frightening with a fuel tank in between... Cirrus is faster than lightning.
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Post subject: Re: Cirrus fails inspection because paint too thick? Posted: 15 Sep 2017, 17:22 |
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Joined: 03/13/11 Posts: 170 Post Likes: +134
Aircraft: TB 20 Trinidad
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Username Protected wrote: It very well could be due to lightning strike requirements. Too much paint over a conductive layer (I'm not sure what they use) prevents the strike from flowing quickly enough to prevent structural damage. Paint is resistive...which is bad in this instance! If the strike lingers it will blow right through the composite structure. That is especially frightening with a fuel tank in between... Cirrus is faster than lightning.
Bryan, Bryan, Bryan,
You know why it "failed" ( I have seen your videos) there was no red carpet and 2 water bottles there.
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Post subject: Re: Cirrus fails inspection because paint too thick? Posted: 16 Sep 2017, 14:56 |
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Joined: 10/18/08 Posts: 1008 Post Likes: +204
Aircraft: Aerostar 601p/700
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Don't own a cirrus and probably never will. Nevertheless, I am curious how one preps a composite airplane like a cirrus or many of the other composite airplane for paint? I imagine stripper would be a bad idea. I would guess just sand back to primer by hand? An orbital sander may get to aggressive and get go through the paint into the composite. Sounds like a lot of work.
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Post subject: Re: Cirrus fails inspection because paint too thick? Posted: 17 Sep 2017, 12:40 |
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Joined: 03/10/11 Posts: 774 Post Likes: +219
Aircraft: B55
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Username Protected wrote: Don't own a cirrus and probably never will. Nevertheless, I am curious how one preps a composite airplane like a cirrus or many of the other composite airplane for paint? I imagine stripper would be a bad idea. I would guess just sand back to primer by hand? An orbital sander may get to aggressive and get go through the paint into the composite. Sounds like a lot of work. Greg Mink has a good video with the shop who painted his (composite) Premier. Explains some of the differences. https://m.youtube.com/watch?v=xScLAZ1AlNs
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Post subject: Re: Cirrus fails inspection because paint too thick? Posted: 17 Sep 2017, 21:47 |
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Joined: 11/29/14 Posts: 37 Post Likes: +61
Aircraft: Cirrus SR22
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Username Protected wrote: Bryan, Bryan, Bryan, You know why it "failed" ( I have seen your videos) there was no red carpet and 2 water bottles there. Whoa! is this THE Bill bennett? From the Socata Bill Bennetts? If so, Hey! Small world. If not, disregard all that. I still see your Trinidad at KDTO from time to time. We upgraded (sold our souls?) to the Cirrus world when we outgrew the TB9. I recently picked up a Grumman Traveler. It s slow but beautiful. When something is that pretty, you don't want it whizzing by at a high rate of speed, you want people to be able to admire it... For a long time... in a single pass. At anyrate, I hope all is well. If you are ever looking to fly somewhere for a bite, give me a holler. bryan@worldsgreatestpilot.com
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Post subject: Re: Cirrus fails inspection because paint too thick? Posted: 18 Sep 2017, 08:32 |
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Joined: 04/06/11 Posts: 7894 Post Likes: +3908
Aircraft: Warbirds
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Username Protected wrote: Don't own a cirrus and probably never will. Nevertheless, I am curious how one preps a composite airplane like a cirrus or many of the other composite airplane for paint? I imagine stripper would be a bad idea. I would guess just sand back to primer by hand? An orbital sander may get to aggressive and get go through the paint into the composite. Sounds like a lot of work. Greg Mink has a good video with the shop who painted his (composite) Premier. Explains some of the differences. https://m.youtube.com/watch?v=xScLAZ1AlNs Sure Flight is next door to us. Great facility.
_________________ Be careful what you ask for, your mechanic wants to sleep at night.
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