David; Service bulletin NO. 15 dated 4/14/67 concerning RH exhaust stack failures: "It is recommended that the spreader bar and the tension spring or any other rigid means of support for the lower ends of the exhaust stack be removed and replaced with the flexible clamp assemblies in order to extend
the service life of the exhaust stack." The service bulletin lists a "New" RH exhaust stack PN A40713-5 as well as a F40400-89 Flexible Clamp Assembly with attaching Hardware. The 40400-89 PN is listed, as an Alon M-10 strap ($6.84 each). So I ordered two of them and installed them in-between the two Adel clamps that had been used to fasten the lower exhaust pipes directly to the engine mounts. Before I did this, I removed the bolts in the clamps and flew the aircraft without any exhaust pipe hangers. The vibration was still noticeable in the engine, but it was no longer being transmitted to the airframe. Lynn Nelsen __________________________________________________________________________ ______ To unsubscribe from this list please send mailto:[EMAIL PROTECTED] _________________________________________________________ Enlighten your in-box. http://www.topica.com/t/15
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