AD 80-21-08
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| aircraft | Lavia Argentina S.A. (Laviasa) | PA-25 | Airworthiness Directives; Piper Model PA-25 Series Airplanes |
| aircraft | Lavia Argentina S.A. (Laviasa) | PA-25-235 | Airworthiness Directives; Piper Model PA-25 Series Airplanes |
| aircraft | Lavia Argentina S.A. (Laviasa) | PA-25-260 | Airworthiness Directives; Piper Model PA-25 Series Airplanes |
Unsafe Condition
Cracks or damage in the forward wing spar cap and misdrilled holes in the bulbed spar flange and skin attach angles could result in structural failure of the wing spar.
AI-generated summary from the source AD text. Verify against the official source before acting.
Required Actions
Inspect forward wing spar caps for cracks using visual and penetrant inspection methods. Check for misdrilled holes in the bulbed spar flange using a specified gage. Install fatigue-resistant doubler plates if not already present. Replace damaged parts and fasteners with specified rivets.
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Compliance Time
Within 5 hours time in service after October 15, 1980, for airplanes with 500+ hours since STC SA501SW; or upon reaching 500 hours or within next 5 hours, whichever is later, for those with less than 500 hours. Fatigue doubler plates must be installed within 100 hours time in service if not installed.
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Affected Aircraft
Piper Model PA-25 series airplanes with STC SA501SW installed.
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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