---------------------------------------------------------- KIS-List Digest Archive --- Total Messages Posted Tue 05/05/15: 5 ---------------------------------------------------------- Today's Message Index: ---------------------- 1. 01:25 PM - Help on this situation. (Galin Hernandez) 2. 02:20 PM - Re: Help on this situation. (M Ketteing) 3. 03:17 PM - Re: Help on this situation. (Alfred Rosa) 4. 03:38 PM - Re: Help on this situation. (Jesse Wright) 5. 10:57 PM - AW: Help on this situation. (Twellmann, Ralf) ________________________________ Message 1 _____________________________________ Time: 01:25:25 PM PST US From: Galin Hernandez Subject: KIS-List: Help on this situation. While cleaning the underbelly of my airplane I noticed a small piece of 1/4" thick hard rubber near where the right main landing gear attaches to the fuselage. (Photo1) I took off all the inspection panels and found that the 1/4" thick hard rubber piece that goes between the landing gear and the fuselage had ripped with the piece I found falling out. I also noted that the fiberglass around the front hole where the bolt enters the fuselage is cracked. (Photos 2-3) I checked the left great attachment and the rubber has not ripped but the fiberglass around the front hole where the bolt enters the fuselage is also cracked. (Photos 5-6) The top part of both bolts inside the fuselage look the same as they have been during every condition inspection. (photos 4 & 7) Not being a fiberglass guy my question is this a safety of flight issue? I am not flying the airplane until I get a better idea of what I am up against. Any help/recommendations are very welcome. No matter what, I will have to get someone nearby to fix this for me since again, I am not a fiberglass guy. ________________________________ Message 2 _____________________________________ Time: 02:20:16 PM PST US From: M Ketteing Subject: Re: KIS-List: Help on this situation. Not a problem for flying. But it could be a big problem on landing. I would not fly until this is fixed. There really needs to be a larger and stronger washer on the top and preferably a real backing plate on top of a perfectly flat area on gear box. This area actually is below part 23 required strength even if done perfectly to the builder's manual. Even the AN6 bolt is loaded a bit more than I like in a critical application but does have a +0.17 margin of safety. To me it looks like there is obvious damage to the fiberglass at the tops of the bolts even beyond the washers. I am sure it is worse under the washers. Also the washers have been overloaded since they are now greatly dished. If you have any dishing of these washers you are overloading them and you need to correct this to prevent damage to the fiberglass and inspect under the washers to make sure there is no damage. Mark Kettering -------------------------------------------- On Tue, 5/5/15, Galin Hernandez wrote: Subject: KIS-List: Help on this situation. To: "kis-list@matronics.com" Date: Tuesday, May 5, 2015, 4:24 PM While cleaning the underbelly of my airplane I noticed a small piece of 1/4" thick hard rubber near where the right main landing gear attaches to the fuselage. (Photo1) I took off all the inspection panels and found that the 1/4" thick hard rubber piece that goes between the landing gear and the fuselage had ripped with the piece I found falling out. I also noted that the fiberglass around thefront hole where the bolt enters the fuselage is cracked.(Photos 2-3) I checked the left great attachment and the rubber has not ripped but the fiberglass around the front hole where the bolt enters the fuselage is also cracked. (Photos 5-6) The top part ofboth bolts inside the fuselage look the same as they have beenduring every condition inspection. (photos 4 &7) Not being a fiberglass guy my question is this a safety of flight issue? I am not flying the airplane until I get a better idea of what I am up against. Any help/recommendations are very welcome. No matter what, I will have to get someone nearby to fix this for me since again, I am not a fiberglass guy. ________________________________ Message 3 _____________________________________ Time: 03:17:21 PM PST US Subject: Re: KIS-List: Help on this situation. From: Alfred Rosa Not usable as is. You need to beef up the whole recessed gear channel with carbon fiber layups. And preferably at the nut end of the bolts also. My 3 cents. On Tue, May 5, 2015 at 4:24 PM, Galin Hernandez wrote: > While cleaning the underbelly of my airplane I noticed a small piece of > 1/4" thick hard rubber near where the right main landing gear attaches to > the fuselage. (Photo1) > > I took off all the inspection panels and found that the 1/4" thick hard > rubber piece that goes between the landing gear and the fuselage had ripped > with the piece I found falling out. I also noted that the fiberglass around > the front hole where the bolt enters the fuselage is cracked. (Photos 2-3) > > I checked the left great attachment and the rubber has not ripped but the > fiberglass around the front hole where the bolt enters the fuselage is also > cracked. (Photos 5-6) > > The top part of both bolts inside the fuselage look the same as they have > been during every condition inspection. (photos 4 & 7) > > Not being a fiberglass guy my question is this a safety of flight issue? I > am not flying the airplane until I get a better idea of what I am up > against. > > Any help/recommendations are very welcome. No matter what, I will have to > get someone nearby to fix this for me since again, I am not a fiberglass > guy. > > ________________________________ Message 4 _____________________________________ Time: 03:38:16 PM PST US Subject: Re: KIS-List: Help on this situation. From: Jesse Wright Galin, Alfred is right in my opinion. That bolt came too close to the edge of the box to satisfy me and could not seat squarely on the surface. I built it out, lapping it over the top until there was a good flat seat for the washer to set on. All built up layers should go out onto the skin surface at least 2 inches. Probably taper them off as they run out. Don't stack them up as this will cause a very stiff edge that will tear loose quicker. By the time the repair is completed they will have lapped out some 3 inches, front side and back side. Mud the washer back in with an epoxy and flox mix. My 2 cents worth is to use at least 12 layers and keep a close eye on it as landings build. Probably run the patch some 12 inches long on each area. Jesse Wright PS OC would also be a good source for advice. Good Luck. On Tue, May 5, 2015 at 4:16 PM, Alfred Rosa wrote: > Not usable as is. You need to beef up the whole recessed gear channel > with carbon fiber layups. > And preferably at the nut end of the bolts also. My 3 cents. > > > On Tue, May 5, 2015 at 4:24 PM, Galin Hernandez > wrote: > >> While cleaning the underbelly of my airplane I noticed a small piece of >> 1/4" thick hard rubber near where the right main landing gear attaches to >> the fuselage. (Photo1) >> >> I took off all the inspection panels and found that the 1/4" thick hard >> rubber piece that goes between the landing gear and the fuselage had ripped >> with the piece I found falling out. I also noted that the fiberglass around >> the front hole where the bolt enters the fuselage is cracked. (Photos 2-3) >> >> I checked the left great attachment and the rubber has not ripped but the >> fiberglass around the front hole where the bolt enters the fuselage is also >> cracked. (Photos 5-6) >> >> The top part of both bolts inside the fuselage look the same as they have >> been during every condition inspection. (photos 4 & 7) >> >> Not being a fiberglass guy my question is this a safety of flight issue? >> I am not flying the airplane until I get a better idea of what I am up >> against. >> >> Any help/recommendations are very welcome. No matter what, I will have to >> get someone nearby to fix this for me since again, I am not a fiberglass >> guy. >> >> > * > > > * > > ________________________________ Message 5 _____________________________________ Time: 10:57:15 PM PST US From: "Twellmann, Ralf" Subject: AW: KIS-List: Help on this situation. 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