AD 70-16-05
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| aircraft | Piper Aircraft Inc. | PA-28-140 | Airworthiness Directives; Piper Model PA-28 Airplanes |
| aircraft | Piper Aircraft Inc. | PA-28-150 | Airworthiness Directives; Piper Model PA-28 Airplanes |
| aircraft | Piper Aircraft Inc. | PA-28-160 | Airworthiness Directives; Piper Model PA-28 Airplanes |
| aircraft | Piper Aircraft Inc. | PA-28-180 | Airworthiness Directives; Piper Model PA-28 Airplanes |
| aircraft | Piper Aircraft Inc. | PA-28S-160 | Airworthiness Directives; Piper Model PA-28 Airplanes |
| aircraft | Piper Aircraft Inc. | PA-28S-180 | Airworthiness Directives; Piper Model PA-28 Airplanes |
Unsafe Condition
Failure of the engine exhaust muffler due to cracks, burn-throughs, weld separations, failed internal baffles, or general deterioration.
AI-generated summary from the source AD text. Verify against the official source before acting.
Required Actions
Inspect the muffler for cracks, burn-throughs, weld separations, failed internal baffles, and general condition using visual inspection with probe light and mirror. Remove the muffler assembly for thorough inspection if needed. Replace or repair damaged mufflers before further flight. Repairs must be welded per AC 43.13-1 or FAA-approved equivalent and pass a submerged pressure check at 10 psi. Install improved muffler part numbers to discontinue inspections.
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 and thereafter at intervals not to exceed 50 hours time in service from the last inspection (for mufflers with 950+ hours on effective date) or within the next 50 hours and thereafter at intervals not to exceed 100 hours until 950 hours, then 50 hours (for mufflers with <950 hours on effective date). Adjust intervals up to 10 hours to align with annual/100-hour inspections.
AI-generated summary from the source AD text. Verify against the official source before acting.
Affected Aircraft
Piper Model PA-28-140 (Serial 28-20001 to 28-26400), PA-28-150, PA-28-160, PA-28S-160, PA-28-180, PA-28S-180 (Serial 28-03, 28-1 through 28-1760A) equipped with Piper muffler Part Numbers 63627-00 or 63688-00.
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
This site is not affiliated with or endorsed by the FAA. Always verify with official sources.