AD 49-29-02
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| aircraft | Textron Aviation Inc. | D18C | Airworthiness Directives; Beech Model D18S, D18C and D18C-T Airplanes |
| aircraft | Textron Aviation Inc. | D18C-T | Airworthiness Directives; Beech Model D18S, D18C and D18C-T Airplanes |
| aircraft | Textron Aviation Inc. | D18S | Airworthiness Directives; Beech Model D18S, D18C and D18C-T Airplanes |
Unsafe Condition
Wear at the forward end of the rudder return springs exceeding 1/32 inch below the surface for half the tube circumference could result in failure of the control linkages.
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Required Actions
Inspect control linkages with rudder return springs for wear. Replace worn linkages if wear exceeds 1/32 inch. Install synthetic rubber bushings between springs and linkages, retaining clips over spring ends, and close last spring coil by tack welding. Replace linkages with those incorporating springs and bushings if springs were not previously installed. Install spring brackets to the rear stabilizer spar as needed.
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Compliance Time
not later than December 1, 1949
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Affected Aircraft
Beech Model D18S, D18C, and D18C-T airplanes
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Federal Register Abstract
Rudder Spring Bushings
Applicability Source Text
Show captured applicability text from the source AD
AD Final Rules - DRS_49-29-02.html Copy URL Print/Save as PDF Document Versions Feedback Details AD Number: 49-29-02 Document Type: AD Final Rules Docket Number: Unknown Subject Heading: Airworthiness Directives; Beech Model D18S, D18C and D18C-T Airplanes Subject: Rudder Spring Bushings Status: Current Citation: This information is not available. Citation Publish Date: Effective Date: Make: Textron Aviation Inc. Model: D18C | D18C-T | D18S Product Type: Aircraft Product Subtype: Small Airplane Affected AD: Superseded AD: Affected By: Superseded By: Service/Office: Office of Primary Responsibility: CFR Part Reference: Part 39 Comments: AIRWORTHINESS DIRECTIVES FINAL RULES: 49-29-02 CITATION: This information is not available. PAGE NUMBER: DOCKET NUMBER: Unknown AMENDMENT: AD NUMBER: 49-29-02 SUBJECT HEADING: Airworthiness Directives; Beech Model D18S, D18C and D18C-T Airplanes ACTION: SUMMARY: DATES: ADDRESSES: FOR FURTHER INFORMATION CONTACT: SUPPLEMENTARY INFORMATION: REGULATORY TEXT: 49-29-02 BEECH: Applies to All Models D18S, D18C and D18C-T Aircraft. Compliance required not later than December 1, 1949. Inspect the control linkages with rudder return springs for wear at the forward end of the springs. If the linkages are worn 1/32 inch or more below the surface for half the tube circumference or greater they should be replaced, otherwise the linkage is considered serviceable. Synthetic rubber bushings should be installed between the springs and the linkages at the forward end of the spring to prevent further wearing of the linkages. To hold the bushings, retaining clips should be installed over the ends of the springs and the last coil of the spring closed by tack welding to prevent the clip from backing off. If the rudder return springs have not been installed previously on the rudder control linkages the complete linkages should be replaced with those incorporating springs and synthetic bushings. It will also be necessary to install spring brackets to the rear stabilizer spar. (Beech Service Bulletin D18-54 covers this same subject and cancels and supersedes Service Bulletins D18-36 and D18-50 and Service Letter D18-26.) This supersedes AD 47-51-09. FOOTER:
Document Text
Show stored source text (verify against official source)
AD Final Rules - DRS_49-29-02.html Copy URL Print/Save as PDF Document Versions Feedback Details AD Number: 49-29-02 Document Type: AD Final Rules Docket Number: Unknown Subject Heading: Airworthiness Directives; Beech Model D18S, D18C and D18C-T Airplanes Subject: Rudder Spring Bushings Status: Current Citation: This information is not available. Citation Publish Date: Effective Date: Make: Textron Aviation Inc. Model: D18C | D18C-T | D18S 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: 49-29-02 CITATION: This information is not available. PAGE NUMBER: DOCKET NUMBER: Unknown AMENDMENT: AD NUMBER: 49-29-02 SUBJECT HEADING: Airworthiness Directives; Beech Model D18S, D18C and D18C-T Airplanes ACTION: SUMMARY: DATES: ADDRESSES: FOR FURTHER INFORMATION CONTACT: SUPPLEMENTARY INFORMATION: REGULATORY TEXT: 49-29-02 BEECH: Applies to All Models D18S, D18C and D18C-T Aircraft. Compliance required not later than December 1, 1949. Inspect the control linkages with rudder return springs for wear at the forward end of the springs. If the linkages are worn 1/32 inch or more below the surface for half the tube circumference or greater they should be replaced, otherwise the linkage is considered serviceable. Synthetic rubber bushings should be installed between the springs and the linkages at the forward end of the spring to prevent further wearing of the linkages. To hold the bushings, retaining clips should be installed over the ends of the springs and the last coil of the spring closed by tack welding to prevent the clip from backing off. If the rudder return springs have not been installed previously on the rudder control linkages the complete linkages should be replaced with those incorporating springs and synthetic bushings. It will also be necessary to install spring brackets to the rear stabilizer spar. (Beech Service Bulletin D18-54 covers this same subject and cancels and supersedes Service Bulletins D18-36 and D18-50 and Service Letter D18-26.) This supersedes AD 47-51-09. FOOTER:
Source: Official FAA Source ↗
Retrieved: Apr 8, 2026
Rights: U.S. Government Public Domain
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