AD 74-06-02
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| aircraft | Cessna Aircraft Company | Piper Aircraft Inc. | 150 | Airworthiness Directives; Cessna Models 150, 170, 172 and 175 and Piper Model PA-28-140 Airplanes |
| aircraft | Cessna Aircraft Company | Piper Aircraft Inc. | 150A | Airworthiness Directives; Cessna Models 150, 170, 172 and 175 and Piper Model PA-28-140 Airplanes |
| aircraft | Cessna Aircraft Company | Piper Aircraft Inc. | 150B | Airworthiness Directives; Cessna Models 150, 170, 172 and 175 and Piper Model PA-28-140 Airplanes |
| aircraft | Cessna Aircraft Company | Piper Aircraft Inc. | 150C | Airworthiness Directives; Cessna Models 150, 170, 172 and 175 and Piper Model PA-28-140 Airplanes |
| aircraft | Cessna Aircraft Company | Piper Aircraft Inc. | 150D | Airworthiness Directives; Cessna Models 150, 170, 172 and 175 and Piper Model PA-28-140 Airplanes |
| aircraft | Cessna Aircraft Company | Piper Aircraft Inc. | 150E | Airworthiness Directives; Cessna Models 150, 170, 172 and 175 and Piper Model PA-28-140 Airplanes |
| aircraft | Cessna Aircraft Company | Piper Aircraft Inc. | 150F | Airworthiness Directives; Cessna Models 150, 170, 172 and 175 and Piper Model PA-28-140 Airplanes |
| aircraft | Cessna Aircraft Company | Piper Aircraft Inc. | 150G | Airworthiness Directives; Cessna Models 150, 170, 172 and 175 and Piper Model PA-28-140 Airplanes |
| aircraft | Cessna Aircraft Company | Piper Aircraft Inc. | 150H | Airworthiness Directives; Cessna Models 150, 170, 172 and 175 and Piper Model PA-28-140 Airplanes |
| aircraft | Cessna Aircraft Company | Piper Aircraft Inc. | 150J | Airworthiness Directives; Cessna Models 150, 170, 172 and 175 and Piper Model PA-28-140 Airplanes |
Unsafe Condition
Possible leakage of carbon monoxide into the cabin heater system due to cracks or leakage in the muffler inner shroud flare and tail pipe weld area.
AI-generated summary from the source AD text. Verify against the official source before acting.
Required Actions
Inspect the muffler inner shroud flare and tail pipe weld area for cracks or leakage prior to further flight. If cracks or leaks are found, replace the muffler with a serviceable unit. Safety wire the cabin heat control in the 'Off' position if no issues are found. Replace the existing muffler with a serviceable unit within 25 hours' time in service after the AD's effective date.
AI-generated summary from the source AD text. Verify against the official source before acting.
Compliance Time
Prior to further flight (for inspection and safety wiring) and within 25 hours' time in service after the effective date for muffler replacement.
AI-generated summary from the source AD text. Verify against the official source before acting.
Affected Aircraft
Cessna Models 150, 170, 172, 175 and Piper Model PA-28-140 airplanes modified with STCs SA750CE, SA806CE, SA807CE, SA777CE, or SA793CE using Avcon Kits with specified serial numbers.
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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