AD 73-22-02
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| aircraft | Aircraft Parts & Development Corp. | A-9 | Airworthiness Directives; Aircraft Parts and Development Corp Models A-9, A- 9A, and A-9B Aircraft |
| aircraft | Aircraft Parts & Development Corp. | A-9A | Airworthiness Directives; Aircraft Parts and Development Corp Models A-9, A- 9A, and A-9B Aircraft |
| aircraft | Aircraft Parts & Development Corp. | A-9B | Airworthiness Directives; Aircraft Parts and Development Corp Models A-9, A- 9A, and A-9B Aircraft |
Unsafe Condition
Water accumulation in the wing lift struts due to insufficient 360-degree fillet welds on both sides of the struts at P/N 10671 eye fittings, leading to corrosion and structural deterioration.
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Required Actions
Inspect welds on both sides of the four wing lift struts at P/N 10671 eye fittings for a 360-degree fillet weld. If welds do not seal, remove strut, check for water/corrosion via visual/x-ray/ultrasonic methods, and either weld, dry/flush/weld, or replace/remove corrosion depending on findings. Replace strut or remove corrosion before further flight if corrosion is present.
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Compliance Time
within the next 100 hours' time in service after the effective date of this AD
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Affected Aircraft
Aircraft Parts & Development Corp Models A-9, A-9A, and A-9B
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Source: Official FAA Source ↗
Retrieved: Apr 8, 2026
Rights: U.S. Government Public Domain
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