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Control Cable AD 2019-21-08

The FAA this morning published AD 2019-21-08, requiring inspection and replacement as necessary of the right aileron control cable turnbuckle assemblies in certain Beech Bonanzas. The AD is attached below.

A few comments:
• The AD is a Final Rule effective November 22, 2019.
• Owners of affected airplanes have until December 22, 2019 to comply with the AD.
• The AD requires one-time inspection of the right aileron control cable by reference to our recommended inspection technique.
• The AD provides credit for previous inspections done in accordance with any of our recommendations for this inspection. Our recommendations changed, narrowing the scope of the inspection, as we learned more from member reports.
• The AD adds the K35, M35, N35 and P35 to our list of affected airplanes. I am attempting to find out why FAA added these models, and whether it was a mistake that can be rectified by removing those models from the AD.

Thank you to the ABS Technical Advisors for identifying this problem and providing solutions, and to all the ABS members who provided reports of their inspections, both positive and negative reports, that provided the data needed to address this issue properly. Thanks also to the FAA and especially the engineers and management of the Wichita Aircraft Certification Office for working cooperatively with ABS Air Safety Foundation to achieve a speedy yet measured response to this serious airworthiness condition. This is an example of airworthiness and regulation done right—we find a problem, we limit the focus to the actual data that emerge, and FAA acts on our recommendations.

attachment

2019-21-08.pdf - 57.6 KB

Posted 11/7/2019 - 4 years ago
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We performed this inspection on D-9179 in September of this year and they were nice and shiny. No issues. Made a log entry showing the inspection per ABS sheet. Should satisfy this AD.

Posted 11/7/2019 - 4 years ago
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UPDATE: I've had several conversations with FAA today about the surprise addition of the K35, M35, N35 and P35 to the list of airplanes affected by 2019-21-08. I now know why these airplanes were added to the list and can make the case that this was done in error. I am actively working to have them removed from the AD. These things don't happen overnight, and there is never a guarantee of success, but I will provide additional updates as information becomes available.

Posted 11/7/2019 - 4 years ago
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Tom: It appears this is a one time inspection and not a recurring. My V35B is D-9982 and thus not affected. Any idea why they stopped at a lower serial number.
I did inspection at first notice and everything was fine.

Posted 11/8/2019 - 4 years ago
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In 1977 the suspect turnbuckles were moved to the wheel well area. Due to the airflow in this area we have not seen any issues. We would still suggest that all aircraft have a one time good visual inspection of all of the primary flight control turnbuckles and cables to ensure continued safe flight.

Bob Ripley
ABS Technical Advisor

Posted 11/8/2019 - 4 years ago
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Thanks very much for your efforts ABS.

Posted 11/10/2019 - 4 years ago
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Is the inspection procedure published anywhere?

Posted 11/11/2019 - 4 years ago
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In reply to: Thomas P. Turner | 11/7/2019 - 4 years ago

UPDATE: I've had several conversations with FAA today about the surprise addition of the K35, M35, N35 and P35 to the list of airplanes affected by 2019-21-08. I now know why these airplanes were added to the list and can make the case that this was done in error. I am actively working to have them removed from the AD. These things don't happen overnight, and there is never a guarantee of success, but I will provide additional updates as information becomes available.

I have an M-35 Bonanza, D-6503. Care to explain why the AD does not apply to my airplane? I am working to get the inspection done sooner rather than later. But with the knowledge that my model may be removed from the list, I'm questioning my decision to have it inspected only a month after the annual.

Posted 11/11/2019 - 4 years ago
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Seth-
I too have an M-model (D-6439). The M-model does NOT have the heater duct running overtop of the aileron cables/turnbuckle. For some reason, Beechcraft used a black colored duct material that likes to absorb moisture. There is a metal wire stiffener runs through the duct material and that wire corrodes. The moisture drips on to the turnbuckle of the right aileron cable and causes corrosion. Our M-models do not have the ductwork so no moisture to drip so no corrosion to damage the cables or turnbuckle.

Posted 11/11/2019 - 4 years ago
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Tom, et-all - So I fully support the AD but are you kidding that the AD is published effective 22 Nov and we have only till 22 Dec to complete the AD?? YGBSM??

I've owned N111GS for 25 years and I can not believe that it's going to fall out of the air 40 some days from now. I wish there would have been some sense for a bit longer compliance time for the AD. Like couldn't it have been complied with during the next annual inspection when the airplane is already apart??

This doesn't make sense,
John "Weebs" Wiebener

Posted 11/11/2019 - 4 years ago
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The AD's states that the affected models include "A36's" within a certain serial number range and "36, all serial numbers". What is a "36"? Does this include G36's?

In other words does "36" include A36's & G36's? If so, then why does it call out A36's separately? Very confusing.

Posted 11/12/2019 - 4 years ago
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Control Cable AD 2019-21-08