M20K V band coupling

[shawnd]

I bought extras not knowing which one will show up when, but I now have an extra at the shop if anyone wants to buy one. This is the 670105 Rev A (riveted). This one pictured is from Textron, the other one is from AirPowerInc where the 8130 doesn't have my tail number in it. $950 ($854 + taxes and free shipping).

[Ragsf15e]

19 minutes ago, shawnd said:

I bought extras not knowing which one will show up when, but I now have an extra at the shop if anyone wants to buy one. This is the 670105 Rev A (riveted). This one pictured is from Textron, the other one is from AirPowerInc where the 8130 doesn't have my tail number in it.

Just need to be careful because that version is for the mb/sb engine, but apparently doesn’t fit the earlier versions.  It’s a little confusing, but I don’t think there’s a riveted version for earlier ones yet, and their original part is unobtainable….

Although there’s been discussion that the RAM PMA version will work on the early tsio-360s.

[Danb]

Does the clamp need be installed on/after the second or third removal, the regs are ambiguous. I just got one $950. 

[Ragsf15e]

5 minutes ago, Danb said:

Does the clamp need be installed on/after the second or third removal, the regs are ambiguous. I just got one $950. 

Yeah that AD is very confusing.  It depends on which clamp you have (riveted or spot welded), if you can track the hours on it (it might not be annotated in the forms when it was installed), the number of times it’s torqued, and finally, the exceptions end ~July 17th.  you’ll have to read the AD a couple times to be sure, but my mechanic said my new riveted one had no limit… it just replaced a spot welded one with unknown hours that would “expire” on July 17th so I haven’t dug any deeper yet.
 

[Danb]

Removed once for top o/h, once for pipe to be welded. Then replaced..plane is 2016 Acclaim 

[Pinecone]

Bravo and K clamps have different ADs.

The Bravo riveted clamp can be re-torqued twice.  After that, if you remove it, you toss it.

The spot welded K clamps have the AD with allowing inspections or replacement by hours.  But the new riveted clamp is not the same part, so AFAIK (and my mechanic) the AD no longer applies.  The AD states "(1) For purposes of this AD, a “v-band coupling” means a spot-welded, multi-segment v-band coupling installed at the tailpipe to turbocharger exhaust housing flange."

I sourced on of the new riveted clamps and had install during the annual last month.

If someone wants/needs a RAM clamp, that may fit the 231, I have one I picked up when the AD came out.  I also have a Continental original, never installed clamp.   Both were purchased before the crazy price increases.

Heck, if you are AOG, I have the clamp that just came off my airplane with 334 hours on it.

 

FYI, the AD requires

1)  The V band clamp to be removed from service and replaced with a new one before 500 hours of use on the clamp

2)  If the time in service cannot be determined, it was to be replaced within 50 hours of the AD

3)  They allowed an inspection instead of replacement.  Done every 6 months or 100 hours up to July 17, 2025.  The inspection details are in the AD

Strangely, if you use the inspection method, you do not get out of doing inspections when you install a new clamp.  But if you replace it based on time, you don't have to do inspections.  Or that is how it reads.

Pictures of the new clamp

[hubcap]

 

I ordered two of these from RAM. The IA installed the other one during Myrtle's annual.

These are welded and work on the TSIO-360-LB among a few others.

 

[PeteMc]

If this was mentioned, sorry I missed it.  But in a couple of weeks (July 18th?) the 6 month inspection option goes away.  This was originally put in place because of the shortage of the bands, which I believe has now been resolved.

And also missed this if it was mentioned.  Since the new bands are "different" than the original one and has a new Part#, I'm assuming the AD does not  apply.  True?

 

[Pinecone]

11 hours ago, PeteMc said:

And also missed this if it was mentioned.  Since the new bands are "different" than the original one and has a new Part#, I'm assuming the AD does not  apply.  True?

 

AD specifically states that the clamps it applies to are SPOT WELDED.  So I, and my A&P/IA, read that as putting on the new riveted clamp means the AD no longer applies.  YMMV with your A&P/IA

[Ragsf15e]

12 hours ago, PeteMc said:

If this was mentioned, sorry I missed it.  But in a couple of weeks (July 18th?) the 6 month inspection option goes away.  This was originally put in place because of the shortage of the bands, which I believe has now been resolved.

And also missed this if it was mentioned.  Since the new bands are "different" than the original one and has a new Part#, I'm assuming the AD does not  apply.  True?

 

As @Pinecone said, the AD calls out spot welded vs riveted, not specific part numbers. I think the RAM part is welded?  It would still be limited if it is.

[ad5ut]

13 hours ago, PeteMc said:

If this was mentioned, sorry I missed it.  But in a couple of weeks (July 18th?) the 6 month inspection option goes away.  This was originally put in place because of the shortage of the bands, which I believe has now been resolved.

And also missed this if it was mentioned.  Since the new bands are "different" than the original one and has a new Part#, I'm assuming the AD does not  apply.  True?

 

As far as the shortage being resolved, I am AOG until I can find two TCM 653332 clamps and Air Power just told me to expect two *years* for them even though they list next week on their web site. Unfortunately I'm stuck at a shop that will not attempt to use the RAM PMA part on a -GB engine since the eligibility only lists -LB engines.

[shawnd]

1 hour ago, ad5ut said:

Unfortunately I'm stuck at a shop that will not attempt to use the RAM PMA part on a -GB engine since the eligibility only lists -LB engines.

That is unfortunate. Looks like the 653337 is superseded by 670105, the 653332 isn't. 

[Ragsf15e]

4 hours ago, ad5ut said:

As far as the shortage being resolved, I am AOG until I can find two TCM 653332 clamps and Air Power just told me to expect two *years* for them even though they list next week on their web site. Unfortunately I'm stuck at a shop that will not attempt to use the RAM PMA part on a -GB engine since the eligibility only lists -LB engines.

That definitely sucks.  Here’s a likely unpopular solution… have the current shop do an inspection on your 653332 iaw with the AD.  That would be legal until july 17th.  In the meantime, find a place willing to use the RAM version which is PMA for your engine, and have it installed there.  

I suspect the 653332 wont be made anymore but will be superceded by a rivets version like the 650105.

[ad5ut]

7 minutes ago, Ragsf15e said:

That definitely sucks.  Here’s a likely unpopular solution… have the current shop do an inspection on your 653332 iaw with the AD.  That would be legal until july 17th.  In the meantime, find a place willing to use the RAM version which is PMA for your engine, and have it installed there.  

I suspect the 653332 wont be made anymore but will be superceded by a rivets version like the 650105.

That's my current plan. It was inspected the week before the pre-buy to comply with the AD and get it to the pre-buy shop, so I'm actually legal with regard to the AD until 7/17 already. However, the pre-buy shop said both clamps are rusted and leaking and there is gray residue all over the area around the turbo. I've asked them what it will take to make it safe to ferry the plane so I can at least get it home and not leave it out in the hail at another airport all summer.

That's what I get for relying on Air Power's online estimated availability and buying the plane before having the clamps in-hand. Hopefully I don't end up having to buy a new engine for want of a clamp, but that's the risk when buying old airplanes.

[PeteMc]

@Pinecone @Ragsf15e  Thanks, that's the way I saw it, but it never hurts to confirm.  

 

[LANCECASPER]

On 7/3/2025 at 3:27 PM, ad5ut said:

However, the pre-buy shop said both clamps are rusted and leaking and there is gray residue all over the area around the turbo. I've asked them what it will take to make it safe to ferry the plane so I can at least get it home and not leave it out in the hail at another airport all summer.

Two new clamps.

[Fix]

Where does it says/specifies that you need to replace Riveted V-Band Clamps after just re-torques?

Especially for V-Band Clamp - Part #670105

[Ragsf15e]

9 hours ago, Fix said:

Where does it says/specifies that you need to replace Riveted V-Band Clamps after just re-torques?

Especially for V-Band Clamp - Part #670105

I don’t think it does. I think there’s one specific clamp (M20M maybe?) that has a torque limit.

[Dammit Bill]

The one that fits the Bravo engine is now close to $2000

Yup


Sent from my iPhone using Tapatalk

[Pinecone]

On 7/5/2025 at 7:42 AM, Fix said:

Where does it says/specifies that you need to replace Riveted V-Band Clamps after just re-torques?

Especially for V-Band Clamp - Part #670105

It is a separate AD that only applies to M20M Bravos.

With them, after two retorques, the clamp must be replaced.

[MikeOH]

5 minutes ago, Pinecone said:

With them, after two retorques, the clamp must be replaced.

Curious: Does that mean a TOTAL of three installs, the initial and then two R&Rs (the 're'torques), or only two installs (initial plus ONE R&R)?

[shawnd]

On 7/1/2025 at 11:32 AM, shawnd said:

I bought extras not knowing which one will show up when, but I now have an extra at the shop if anyone wants to buy one. This is the 670105 Rev A (riveted). This one pictured is from Textron, the other one is from AirPowerInc where the 8130 doesn't have my tail number in it. $950 ($854 + taxes and free shipping).

This has been sold. Thanks folks.

[Pinecone]

19 hours ago, MikeOH said:

Curious: Does that mean a TOTAL of three installs, the initial and then two R&Rs (the 're'torques), or only two installs (initial plus ONE R&R)?

I thought it was two total, but someone corrected me that it was two after the initial install.  I am not totally sure as I don't have a Bravo so was not as interested in that one.

 

[Danb]

I just replaced one and the MSC said two not three, the way I read it it was three they disagreed so it was two. I didn’t want it to hold up my annual..

[Pinecone]

What is the AD number for the Bravos?