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Airworthiness Directive 48-25-02 (25 hour exhaust inspection) Applicability

Posted: Thu Oct 20, 2022 5:18 pm
by nstolley
Hello all,

New owner of Cessna 120 N77248 sn11710. I purchased it in December 2021.

I was told I have to inspect the exhaust every 25 hours. I have the straight stacks. From my reading of AD 48-25-02, it only applies to "those aircraft equipped with exhaust muffler assemblies that are fabricated by welding exhaust stacks to muffler." Since I don't have mufflers, I believe the AD does not apply. Is this the generally recognized interpretation around the organization?

-Nicholas

Re: Airworthiness Directive 48-25-02 (25 hour exhaust inspection) Applicability

Posted: Thu Oct 20, 2022 7:19 pm
by 6643
You are correct. It only applies to what are "affectionately" known as "pancake mufflers".