Airworthiness Directives; Piper Aircraft, Inc. Models PA-32R-301T and PA-46-350P Airplanes

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We propose to adopt a new airworthiness directive (AD) for certain Piper Aircraft, Inc. Models PA-32R-301T and PA-46-350P airplanes. This proposed AD would require you to replace any spot- welded V-band exhaust coupling with a riveted V-band exhaust coupling. This proposed AD results from reports that spot-welded V-band exhaust couplings are failing. We are proposing this AD to prevent failure of the V-band exhaust coupling, which could cause the exhaust pipe to detach from the turbocharger. This failure could result in release of high temperature gases inside the engine compartment and possibly cause an in-flight fire. An in-flight fire could lead to loss of control.