AD 73-15-05
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| aircraft | Lavia Argentina S.A. (Laviasa) | PA-25-235 | Airworthiness Directives; Piper Model PA-25-235 Airplanes |
Unsafe Condition
Cracks in the left and right 7/8 inch x 0.035 inch upper longerons (P/N 61001-5) and 3/4 inch x 0.035 inch upper longerons (P/N 64001-13 and -14) in the hopper and fuel bays, which could lead to structural failure.
AI-generated summary from the source AD text. Verify against the official source before acting.
Required Actions
Inspect left and right 7/8 inch x 0.035 inch upper longerons (P/N 61001-5) in the hopper bay for cracks using dye penetrant with 10-power glass or X-ray per Piper Service Letter 463A. If cracks are found, inspect fuel bay longerons (P/N 64001-13/-14) similarly. Repair cracked longerons per Piper Service Letter 463 or FAA-approved method. Install reinforcement sleeves per SB 341 within 625 hours time in service from AD effective date.
AI-generated summary from the source AD text. Verify against the official source before acting.
Compliance Time
Within the next 25 hours' time in service after the effective date of this AD unless already accomplished within the last 275 hours time in service, and thereafter at intervals not to exceed 300 hours time in service until repair or sleeve addition. Reinforcement sleeves must be added within 625 hours time in service from the effective date.
AI-generated summary from the source AD text. Verify against the official source before acting.
Affected Aircraft
Piper Model PA-25-235 Airplanes, Serial Numbers 25-02 and 25-2000 through 25-3731 without reinforcement sleeves per AD 66-7-6, Service Letter 463, or SB 341.
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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