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
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Subject: | 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
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Subject: | Re: 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 <galinhdz@gmail.com> wrote:
Subject: KIS-List: Help on this situation.
To: "kis-list@matronics.com" <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
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Subject: | Re: Help on this situation. |
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 <galinhdz@gmail.com> 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
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Subject: | Re: Help on this situation. |
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 <fredorosa@gmail.com> 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 <galinhdz@gmail.com>
> 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
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Subject: | Help on this situation. |
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