AD 83-14-04
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| aircraft | Cessna Aircraft Company | 172RG | Airworthiness Directives; Cessna Model 172RG Airplanes |
Unsafe Condition
Carbon monoxide contamination entering the cabin area due to potential cracks in the muffler flanges and improper cabin heater shroud installation.
AI-generated summary from the source AD text. Verify against the official source before acting.
Required Actions
Modify the cabin heater shroud per Cessna Service Letter SE83-13 within 25 hours time-in-service after AD effective date. Inspect muffler flanges for cracks and repair/replace cracked components. Subsequent inspections every 50 hours time-in-service, with pre-flight repair checks. Alternatively, deactivate cabin heat system by disconnecting control cable and ensuring valve is spring-loaded closed or safety-wired.
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Compliance Time
Within the next 25 hours time-in-service after the effective date of this AD
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Affected Aircraft
Cessna Model 172RG airplanes certificated in any category
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Source: Official FAA Source ↗
Retrieved: Apr 8, 2026
Rights: U.S. Government Public Domain
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