AD 47-06-09
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| aircraft | Textron Aviation Inc. | Army AT-11 | Airworthiness Directives; Beech Models AT-11 and C18S Airplanes |
| aircraft | Textron Aviation Inc. | C18S | Airworthiness Directives; Beech Models AT-11 and C18S Airplanes |
Unsafe Condition
Collapse of the landing gear due to cracking of the shock cylinder retracting leg attachment lugs or failure of the retracting legs.
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Required Actions
Check rear leg and lug lengths to ensure correct installation combinations. Inspect shock cylinder lugs for cracks and replace or repair as necessary. Replace certain rear legs with Beech P/N 804-188416 if they have a 1 3/4 inches diameter reinforcing tube welded to original ends.
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Compliance Time
next periodic inspection
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Affected Aircraft
Beech Models AT-11 and C18S equipped with 33-inch tires.
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Federal Register Abstract
Landing Gear Retracting Mechanism
Applicability Source Text
Show captured applicability text from the source AD
AD Final Rules - DRS_47-06-09.html Copy URL Print/Save as PDF Document Versions Feedback Details AD Number: 47-06-09 Document Type: AD Final Rules Docket Number: Unknown Subject Heading: Airworthiness Directives; Beech Models AT-11 and C18S Airplanes Subject: Landing Gear Retracting Mechanism Status: Current Citation: This information is not available. Citation Publish Date: Effective Date: Make: Textron Aviation Inc. Model: Army AT-11 | C18S Product Type: Aircraft Product Subtype: Small Airplane Affected AD: Superseded AD: Affected By: Superseded By: Service/Office: Office of Primary Responsibility: CFR Part Reference: Part 39 Comments: AIRWORTHINESS DIRECTIVES FINAL RULES: 47-06-09 CITATION: This information is not available. PAGE NUMBER: DOCKET NUMBER: Unknown AMENDMENT: AD NUMBER: 47-06-09 SUBJECT HEADING: Airworthiness Directives; Beech Models AT-11 and C18S Airplanes ACTION: SUMMARY: DATES: ADDRESSES: FOR FURTHER INFORMATION CONTACT: SUPPLEMENTARY INFORMATION: REGULATORY TEXT: 47-06-09 BEECH: (Was Mandatory Note 1 of AD-2-582-2 and Mandatory Note 4 of AD-757-2.) Applies to All AT-11 and C18S Airplanes Equipped With 33-Inch Tires. Compliance required at next periodic inspection. To prevent collapse of the landing gear due to cracking of the shock cylinder retracting leg attachment lugs or failure of the retracting legs the following items should be complied with: (1) Check the rear leg and lug lengths to ascertain whether they have been previously modified. Rear legs (Beech P/N 18820) 22 7/8 inches between hole centers should be installed only with cylinders having original lugs (approximately 1 7/8 inches from centerline of holes to outside of cylinder wall). Rear legs 23 19/64 inches between hole centers should be installed only with cylinders having short modified lugs (approximately 7/8 inch from centerline of holes to outside of cylinder wall). Legs 23 19/64 inches long with a 1 3/4 inches diameter reinforcing tube welded to the original ends should be replaced with Beech P/N 804-188416. (2) Inspect the shock cylinder lugs for cracks. If cracks are found in the lugs either the cylinder must be replaced or the cracks repaired. Contact FAA, Kansas City, MO., for repair methods. (Beech Service Bulletin C18-6 covers this same subject.) FOOTER:
Document Text
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AD Final Rules - DRS_47-06-09.html Copy URL Print/Save as PDF Document Versions Feedback Details AD Number: 47-06-09 Document Type: AD Final Rules Docket Number: Unknown Subject Heading: Airworthiness Directives; Beech Models AT-11 and C18S Airplanes Subject: Landing Gear Retracting Mechanism Status: Current Citation: This information is not available. Citation Publish Date: Effective Date: Make: Textron Aviation Inc. Model: Army AT-11 | C18S 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: 47-06-09 CITATION: This information is not available. PAGE NUMBER: DOCKET NUMBER: Unknown AMENDMENT: AD NUMBER: 47-06-09 SUBJECT HEADING: Airworthiness Directives; Beech Models AT-11 and C18S Airplanes ACTION: SUMMARY: DATES: ADDRESSES: FOR FURTHER INFORMATION CONTACT: SUPPLEMENTARY INFORMATION: REGULATORY TEXT: 47-06-09 BEECH: (Was Mandatory Note 1 of AD-2-582-2 and Mandatory Note 4 of AD-757-2.) Applies to All AT-11 and C18S Airplanes Equipped With 33-Inch Tires. Compliance required at next periodic inspection. To prevent collapse of the landing gear due to cracking of the shock cylinder retracting leg attachment lugs or failure of the retracting legs the following items should be complied with: (1) Check the rear leg and lug lengths to ascertain whether they have been previously modified. Rear legs (Beech P/N 18820) 22 7/8 inches between hole centers should be installed only with cylinders having original lugs (approximately 1 7/8 inches from centerline of holes to outside of cylinder wall). Rear legs 23 19/64 inches between hole centers should be installed only with cylinders having short modified lugs (approximately 7/8 inch from centerline of holes to outside of cylinder wall). Legs 23 19/64 inches long with a 1 3/4 inches diameter reinforcing tube welded to the original ends should be replaced with Beech P/N 804-188416. (2) Inspect the shock cylinder lugs for cracks. If cracks are found in the lugs either the cylinder must be replaced or the cracks repaired. Contact FAA, Kansas City, MO., for repair methods. (Beech Service Bulletin C18-6 covers this same subject.) FOOTER:
Source: Official FAA Source ↗
Retrieved: Apr 8, 2026
Rights: U.S. Government Public Domain
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