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Separating nosewheel strut

The nosewheel strut appears to be separating from the wheel arm. The center photo shows the plug in the underside of the arm opposite the end of the strut. I would appreciate a call with your assessment of the damage and the appropriate correction. Thank you. Russell Cyphers 602 370-7455.

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Model: Bonanza N35
Aircraft Serial Number: D-6806
Posted 10/29/2023 - 4 months ago
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Pics 50 & 57 look like there may have been a shift. Note this area of the strut piston (chrome part) I have seen not as well machined, so it may be an optical illusion. Pic 59, I'm not recognizing a shift.

Look at the back side of the fork (wheel arm). There will be a hole in the upper interface area that is drilled and tapped through the fork into the piston. Normally has a 1/4-28 bolt installed. This is used to hold the nose wheel scraper along with a couple of other sets of hardware. If the scraper was removed, the bolt should have been reinstalled as a safety to keep from having this type of shift, but the interference fit between the two parts should not allow any movement.

What is the alignment of that hole? Do you have a pic of that?

Mike
ABS Technical Advisor

Posted 10/29/2023 - 4 months ago
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In addition, take a look at the first photo, there is a black mark in the edge of the fork right at the top edge on the white area. This is where the rubber bumper on the cross brace for the nose gear "A" frame hits the strut when gear is retracted. If there was separation was present then it would be hitting the chrome part of the strut instead. There is no evidence in the photo that anything is hitting the chrome part of the strut.
I also agree with Mike, there does not appear to be any movement when looking in the bottom.

Bob Ripley
ABS Technical Advisor

Posted 10/30/2023 - 4 months ago
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I am with Michael on alignment of the bolt holes. The fork and strut are “shrunk” together during manufacturing, so they shouldn’t come apart. That being said, there looks like some corrosion on the fork under all that paint. Corrosion could potentially turn the strut loose, if the bolt isn’t holding it in place.

Posted 10/31/2023 - 3 months ago
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What? There is supposed to be a bolt there? I wonder how long it hasn't been.

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Posted 10/31/2023 - 3 months ago
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Probably since the mud scraper was removed. See if you can clean the hole out and thread a 1/4-28 bolt in.

Posted 10/31/2023 - 3 months ago
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You can also put strut back into the housing and install cap on top, then check vertical play up and down. If strut has moved the vertical play will be excessive.

Bob Ripley
ABS Technical Advisor

Posted 11/1/2023 - 3 months ago
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In reply to: Michael E. Thompson | 10/29/2023 - 4 months ago

Pics 50 & 57 look like there may have been a shift. Note this area of the strut piston (chrome part) I have seen not as well machined, so it may be an optical illusion. Pic 59, I'm not recognizing a shift.

Look at the back side of the fork (wheel arm). There will be a hole in the upper interface area that is drilled and tapped through the fork into the piston. Normally has a 1/4-28 bolt installed. This is used to hold the nose wheel scraper along with a couple of other sets of hardware. If the scraper was removed, the bolt should have been reinstalled as a safety to keep from having this type of shift, but the interference fit between the two parts should not allow any movement.

What is the alignment of that hole? Do you have a pic of that?

Mike
ABS Technical Advisor

Am I interpreting this correctly about the bolt? My strut is not pressed in anywhere near that far to the bolt hole. It stops at least an inch higher up.and the bolt hole never tapped all the way through.

Posted 11/1/2023 - 3 months ago
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The bolt it only there to secure the mud scraper if installed. But still best to put the bolt back in if the scraper has been removed. The bolt in no way secures the strut to the casting.

Posted 11/1/2023 - 3 months ago
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Keith;

Look at the bottom of the top collar portion of the fork and confirm the piston is seated against the smaller diameter of the collar; if so, there is an undetected thus far manufacturing defect. I would also jack the aircraft and release the nitrogen charge and confirm the strut will completely collapse. If it does not, then the piston is indeed not properly installed / manufactured and the internal portion of the strut is bottoming, not good. For further detail on any available repairs, I would contact John at Delta Strut for a repair consultation.

Tracy;

I agree the bolt in and of itself, does not secure the piston to the fork, but the absence of the bolt and no hole alignment warrants further investigation.

Mike
ABS Technical Advisor

Posted 11/1/2023 - 3 months ago
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Separating nosewheel strut