AD 77-21-06
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| aircraft | Lavia Argentina S.A. (Laviasa) | PA-25 | Airworthiness Directives; Piper Models PA-25, PA-25-235 and PA-25-260 Airplanes |
| aircraft | Lavia Argentina S.A. (Laviasa) | PA-25-235 | Airworthiness Directives; Piper Models PA-25, PA-25-235 and PA-25-260 Airplanes |
| aircraft | Lavia Argentina S.A. (Laviasa) | PA-25-260 | Airworthiness Directives; Piper Models PA-25, PA-25-235 and PA-25-260 Airplanes |
Unsafe Condition
Weakening of the fuselage steel tubing cluster in the area of the rear wing spar attachment due to corrosion of the fuselage tubing.
AI-generated summary from the source AD text. Verify against the official source before acting.
Required Actions
Inspect the fuselage steel tubing cluster in the area of the rear wing spar attachment and repair if necessary, in accordance with Piper Service Bulletin No. 551 or equivalent. Equivalent inspections and repairs must be approved by the Chief, Engineering and Manufacturing Branch, FAA, Eastern Region. Inspection intervals may be adjusted upon submission of substantiating data through an FAA Maintenance Inspector.
AI-generated summary from the source AD text. Verify against the official source before acting.
Compliance Time
Within the next 30 days in service after the effective date of this AD or upon the attainment of a total of 1 year in service, whichever occurs later, unless previously accomplished within the last year and at intervals not to exceed 1 year from the last inspection.
AI-generated summary from the source AD text. Verify against the official source before acting.
Affected Aircraft
Piper Models PA-25, PA-25-235 and PA-25-260, Serial Nos. 25-1 and up.
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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