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

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nstolley
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Joined: Thu Feb 03, 2022 11:35 am
Name: Nicholas Stolley
Location: Webster, MN
Aircraft Type: C-120 N77248 #11710
Occupation-Interests: Occupation-737 Pilot. Avocation-Pilot. I'll fly anything I can get my hands on; Airplanes, helicopters, gyroplanes, gliders.
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Airworthiness Directive 48-25-02 (25 hour exhaust inspection) Applicability

Post 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
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6643
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Name: John C
Location: KLCI, NH
Aircraft Type: 1946 C140/C90
Occupation-Interests: A&P, semi-retired
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Re: Airworthiness Directive 48-25-02 (25 hour exhaust inspection) Applicability

Post by 6643 »

You are correct. It only applies to what are "affectionately" known as "pancake mufflers".
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