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
AI-generated summary from the source AD text. Verify against the official source before acting.
Federal Register Abstract
Wing Lift Struts
Applicability Source Text
Show captured applicability text from the source AD
AD Final Rules - DRS_73-22-02.html Copy URL Print/Save as PDF Document Versions Feedback Details AD Number: 73-22-02 Document Type: AD Final Rules Docket Number: Unknown Subject Heading: Airworthiness Directives; Aircraft Parts and Development Corp Models A-9, A- 9A, and A-9B Aircraft Subject: Wing Lift Struts Status: Current Citation: This information is not available. Citation Publish Date: Effective Date: 11/20/1973 Make: Aircraft Parts & Development Corp. Model: A-9 | A-9A | A-9B Product Type: Aircraft Product Subtype: Small Airplane Affected AD: Superseded AD: Affected By: Superseded By: Service/Office: Office of Primary Responsibility: CFR Part Reference: Part 39 Comments: AIRWORTHINESS DIRECTIVES FINAL RULES: 73-22-02 CITATION: This information is not available. PAGE NUMBER: DOCKET NUMBER: Unknown AMENDMENT: 39-1737 AD NUMBER: 73-22-02 SUBJECT HEADING: Airworthiness Directives; Aircraft Parts and Development Corp Models A-9, A- 9A, and A-9B Aircraft ACTION: SUMMARY: DATES: Effective November 20, 1973. ADDRESSES: FOR FURTHER INFORMATION CONTACT: SUPPLEMENTARY INFORMATION: REGULATORY TEXT: 73-22-02 AIRCRAFT PARTS and DEVELOPMENT CORP.: Amendment 39-1737. Applies to Models A-9, A- 9A, and A-9B. Compliance required within the next 100 hours' time in service after the effective date of this AD, unless already accomplished. To prevent water accumulation in the wing lift struts and associated detrimental effects, accomplish the following: (a) Inspect visually for welds on both sides of the four wing lift struts at the P/N 10671 eye fittings. A 360 degree fillet weld is required around the eye fitting shank on both sides of the lift strut to seal the strut against moisture. These fittings provide for attachment of the lift struts to the stabilizing struts. (b) If the welds between the eye fittings and the lift struts do not provide a complete seal as specified above, the lift strut should be removed and checked for water ingestion visually and for corrosion by x-ray, ultrasonic or equivalent method approved by the Chief, Engineering and Manufacturing Branch, FAA, Southwest Region. (1) If no water or corrosion is present in the strut, weld the eye fitting to the strut 360 degrees on both sides of the strut and reinstall the strut. (2) If water is present in the strut (without corrosion), dry the strut, flush with linseed oil, weld the eye fitting to the strut 360 degrees on both sides of the strut and reinstall the strut. (3) If corrosion is found, before further flight, the affected lift strut must be replaced or corrosion must be removed in accordance with a procedure approved by the Chief, Engineering and Manufacturing Branch, FAA, Southwest Region. (c) If the welds between the eye fittings and the lift struts provide a complete seal as specified above, no further action is required. (APDC Service Bulletin No. A-23 covers this same subject.) This amendment becomes effective November 20, 1973. FOOTER:
Document Text
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AD Final Rules - DRS_73-22-02.html Copy URL Print/Save as PDF Document Versions Feedback Details AD Number: 73-22-02 Document Type: AD Final Rules Docket Number: Unknown Subject Heading: Airworthiness Directives; Aircraft Parts and Development Corp Models A-9, A- 9A, and A-9B Aircraft Subject: Wing Lift Struts Status: Current Citation: This information is not available. Citation Publish Date: Effective Date: 11/20/1973 Make: Aircraft Parts & Development Corp. Model: A-9 | A-9A | A-9B Product Type: Aircraft Product Subtype: Small Airplane Affected AD: Superseded AD: Affected By: Superseded By: Service/Office: Office of Primary Responsibility: CFR Part Reference: Part 39 Comments: AIRWORTHINESS DIRECTIVES FINAL RULES: 73-22-02 CITATION: This information is not available. PAGE NUMBER: DOCKET NUMBER: Unknown AMENDMENT: 39-1737 AD NUMBER: 73-22-02 SUBJECT HEADING: Airworthiness Directives; Aircraft Parts and Development Corp Models A-9, A- 9A, and A-9B Aircraft ACTION: SUMMARY: DATES: Effective November 20, 1973. ADDRESSES: FOR FURTHER INFORMATION CONTACT: SUPPLEMENTARY INFORMATION: REGULATORY TEXT: 73-22-02 AIRCRAFT PARTS and DEVELOPMENT CORP.: Amendment 39-1737. Applies to Models A-9, A- 9A, and A-9B. Compliance required within the next 100 hours' time in service after the effective date of this AD, unless already accomplished. To prevent water accumulation in the wing lift struts and associated detrimental effects, accomplish the following: (a) Inspect visually for welds on both sides of the four wing lift struts at the P/N 10671 eye fittings. A 360 degree fillet weld is required around the eye fitting shank on both sides of the lift strut to seal the strut against moisture. These fittings provide for attachment of the lift struts to the stabilizing struts. (b) If the welds between the eye fittings and the lift struts do not provide a complete seal as specified above, the lift strut should be removed and checked for water ingestion visually and for corrosion by x-ray, ultrasonic or equivalent method approved by the Chief, Engineering and Manufacturing Branch, FAA, Southwest Region. (1) If no water or corrosion is present in the strut, weld the eye fitting to the strut 360 degrees on both sides of the strut and reinstall the strut. (2) If water is present in the strut (without corrosion), dry the strut, flush with linseed oil, weld the eye fitting to the strut 360 degrees on both sides of the strut and reinstall the strut. (3) If corrosion is found, before further flight, the affected lift strut must be replaced or corrosion must be removed in accordance with a procedure approved by the Chief, Engineering and Manufacturing Branch, FAA, Southwest Region. (c) If the welds between the eye fittings and the lift struts provide a complete seal as specified above, no further action is required. (APDC Service Bulletin No. A-23 covers this same subject.) This amendment becomes effective November 20, 1973. FOOTER:
Source: Official FAA Source ↗
Retrieved: Apr 8, 2026
Rights: U.S. Government Public Domain
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