AD 48-25-02
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| aircraft | Cessna Aircraft Company | 120 | Airworthiness Directives; CESSNA Model 120 and 140 Airplanes |
| aircraft | Cessna Aircraft Company | 140 | Airworthiness Directives; CESSNA Model 120 and 140 Airplanes |
Unsafe Condition
Cracks in the Cessna welded exhaust muffler assemblies, particularly at the welds between exhaust stacks and muffler assemblies, could lead to exhaust leaks and potential fire hazards.
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Required Actions
Inspect muffler assemblies every 25 hours of operation for cracks adjacent to welds between exhaust stacks and muffler assemblies. Remove carburetor air heater muff and cabin heater muff for inspection. Revise the placard to require inspection every 25 hours instead of every 100 hours.
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Compliance Time
each 25 hours of operation
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Affected Aircraft
Cessna Model 120 and 140 aircraft equipped with Cessna Welded Exhaust Muffler Assemblies.
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Source: Official FAA Source ↗
Retrieved: Apr 8, 2026
Rights: U.S. Government Public Domain
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