AD 67-03-01
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| aircraft | Cessna Aircraft Company | 150 | Airworthiness Directives; CESSNA Model 150 Series Airplanes |
| aircraft | Cessna Aircraft Company | 150A | Airworthiness Directives; CESSNA Model 150 Series Airplanes |
| aircraft | Cessna Aircraft Company | 150B | Airworthiness Directives; CESSNA Model 150 Series Airplanes |
| aircraft | Cessna Aircraft Company | 150C | Airworthiness Directives; CESSNA Model 150 Series Airplanes |
| aircraft | Cessna Aircraft Company | 150D | Airworthiness Directives; CESSNA Model 150 Series Airplanes |
| aircraft | Cessna Aircraft Company | 150E | Airworthiness Directives; CESSNA Model 150 Series Airplanes |
| aircraft | Cessna Aircraft Company | 150F | Airworthiness Directives; CESSNA Model 150 Series Airplanes |
| aircraft | Cessna Aircraft Company | 150G | Airworthiness Directives; CESSNA Model 150 Series Airplanes |
| aircraft | Cessna Aircraft Company | 150H | Airworthiness Directives; CESSNA Model 150 Series Airplanes |
| aircraft | Cessna Aircraft Company | 150J | Airworthiness Directives; CESSNA Model 150 Series Airplanes |
Unsafe Condition
Cracking of the right-hand exhaust gas cabin heat exchanger (muffler) allows carbon monoxide to enter the cabin when the cabin heat is 'ON'.
AI-generated summary from the source AD text. Verify against the official source before acting.
Required Actions
Inspect the right-hand exhaust gas cabin heat exchanger via a 1.5 p.s.i. pressure test or conduct a ground test with a carbon monoxide indicator. Replace cracked exchangers before further flight. Repeat inspections at intervals not exceeding 100 hours' time in service until the exhaust system is modified per Cessna Service Letter No. 65-72 or equivalent.
AI-generated summary from the source AD text. Verify against the official source before acting.
Compliance Time
within the next 50 hours' time in service after the effective date of this AD, unless already accomplished within the last 50 hours' time in service, and thereafter at intervals not to exceed 100 hours' time in service from the last inspection
AI-generated summary from the source AD text. Verify against the official source before acting.
Affected Aircraft
Cessna Model 150 Series Airplanes, Serial Numbers 17001 through 15061328, equipped with right-hand exhaust gas cabin heat exchanger (muffler)
AI-generated summary from the source AD text. Verify against the official source before acting.
Source: Official FAA Source ↗
Retrieved: Apr 8, 2026
Rights: U.S. Government Public Domain
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