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-   -   Urgent Heater Muff/Exhaust Heads Up! (https://vansairforce.net/community/showthread.php?t=189774)

johnbright 12-23-2021 03:17 PM

Quote:

Originally Posted by ShortSnorter (Post 1577342)
... If anyone does have interest in ordering the Robbins muffs, you have to email him as there is no website. Unfortunately I can't find the email address, but I'm sure someone on here has it.

Earlier post in this thread: https://vansairforce.net/community/s...5&postcount=32

ShortSnorter 12-23-2021 05:05 PM

Quote:

Originally Posted by johnbright (Post 1577349)

Thanks! Imagine that!

JDBoston 12-25-2021 08:13 AM

Quote:

Originally Posted by rvbuilder2002 (Post 1483927)
We have noted a lack of longevity of the heat muff end ribs and it is currently being looked at by engineering.
More info when I have it.

In the mean time, be sure to do a thorough exhaust system inspection during each condition inspection in accordance with AC43.13 Appendix D.

Scott,
Was there an outcome from the investigation with engineering?

Thanks.

rvbuilder2002 12-25-2021 02:08 PM

Quote:

Originally Posted by JDBoston (Post 1577597)
Scott,
Was there an outcome from the investigation with engineering?

Thanks.

I think one of the guys on the sustaining engineering team is working on this project now.

n982sx 12-28-2021 07:44 PM

I checked mine when I first heard of the problem earlier this year but found no wear.

At the last annual however, two months ago, I found that the circular ends of the forward muff had cracked and needed to be replaced. I ordered new parts, including enough to do the rear muff.

The parts were backordered at the time, but they shipped about a month ago. When I rebuilt the muffs, I found no wear on the exhaust. It is on my list of items to check whenever the lower cowl is off.

450 hours on the old ones with no wear. We'll see how the new ones hold up.

bruceh 12-28-2021 08:29 PM

Quote:

Originally Posted by rvbuilder2002 (Post 1483927)
In the mean time, be sure to do a thorough exhaust system inspection during each condition inspection in accordance with AC43.13 Appendix D.

I think you mean
14 CFR 43 Appendix D.

Kedy.va 01-13-2022 03:33 PM

I am installing the sleeves and I made a slider in one of the holes so that when I tightened them with the clamp it fits more

Driving '67 01-26-2022 02:02 PM

Joined the club
 
3 Attachment(s)
87 hrs TTSN Thunderbolt IO-390. Found doing annual. Aft muff assembly end broken Replaced end caps with Robbins product (great quality). Rest of the annual was good!

BruceW 01-27-2022 11:46 AM

Just make Rick Robbins the supplier to Vans for the end plates.

mountainride 01-27-2022 04:36 PM

Quote:

Just make Rick Robbins the supplier to Vans for the end plates.
This is the correct answer. The Vans muffs are mis-engineered and should not be installed. Mine failed under 100 hours. I believe he used to be the supplier before they were brought in house.


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