AD 56-09-02
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| aircraft | Martin-Marietta Corporation | 202 | MARTIN Models 202, 202A, and 404 Aircraft |
| aircraft | Martin-Marietta Corporation | 202A | MARTIN Models 202, 202A, and 404 Aircraft |
| aircraft | Martin-Marietta Corporation | 404 | MARTIN Models 202, 202A, and 404 Aircraft |
Unsafe Condition
Shearing of rivets securing the rudder torque tube flange (P/N 2021U42196) to the rudder torque tube (P/N 2021D19331) caused by gust buffeting with gust locks not engaged, resulting in loss of adequate and/or positive rudder control.
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Required Actions
Replace the 3/16-inch rivets with 1/4-inch 24ST heat treated rivets.
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Compliance Time
September 1, 1956
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Affected Aircraft
Martin-Marietta Corporation Models 202, 202A, and 404 Aircraft
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Federal Register Abstract
Rudder Torque Tube Rivets
Applicability Source Text
Show captured applicability text from the source AD
AD Final Rules - DRS_56-09-02.html Copy URL Print/Save as PDF Document Versions Feedback Details AD Number: 56-09-02 Document Type: AD Final Rules Docket Number: Unknown Subject Heading: MARTIN Models 202, 202A, and 404 Aircraft Subject: Rudder Torque Tube Rivets Status: Current Citation: This information is not available. Citation Publish Date: Effective Date: Make: Martin-Marietta Corporation Model: 202 | 202A | 404 Product Type: Aircraft Product Subtype: Large Airplane Affected AD: Superseded AD: Affected By: Superseded By: Service/Office: Office of Primary Responsibility: CFR Part Reference: Part 39 Comments: AIRWORTHINESS DIRECTIVES FINAL RULES: 56-09-02 CITATION: This information is not available. PAGE NUMBER: DOCKET NUMBER: Unknown AMENDMENT: AD NUMBER: 56-09-02 SUBJECT HEADING: MARTIN Models 202, 202A, and 404 Aircraft ACTION: SUMMARY: DATES: ADDRESSES: FOR FURTHER INFORMATION CONTACT: SUPPLEMENTARY INFORMATION: REGULATORY TEXT: 56-09-02 MARTIN: Applies to All Models 202, 202A, and 404 Aircraft. Compliance required by September 1, 1956. In order to eliminate shearing of rivets securing the rudder torque tube flange, P/N 2021U42196, to the rudder torque tube, P/N 2021D19331, caused by gust buffeting with gust locks not engaged and resulting in loss of adequate and/or positive rudder control, it is necessary to replace the 3/16-inch rivets with 1/4-inch 24ST heat treated rivets. (Martin Service Instruction Letters No. 202/202A-36 and No. 404-69 cover this same subject.) FOOTER:
Document Text
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AD Final Rules - DRS_56-09-02.html Copy URL Print/Save as PDF Document Versions Feedback Details AD Number: 56-09-02 Document Type: AD Final Rules Docket Number: Unknown Subject Heading: MARTIN Models 202, 202A, and 404 Aircraft Subject: Rudder Torque Tube Rivets Status: Current Citation: This information is not available. Citation Publish Date: Effective Date: Make: Martin-Marietta Corporation Model: 202 | 202A | 404 Product Type: Aircraft Product Subtype: Large 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: 56-09-02 CITATION: This information is not available. PAGE NUMBER: DOCKET NUMBER: Unknown AMENDMENT: AD NUMBER: 56-09-02 SUBJECT HEADING: MARTIN Models 202, 202A, and 404 Aircraft ACTION: SUMMARY: DATES: ADDRESSES: FOR FURTHER INFORMATION CONTACT: SUPPLEMENTARY INFORMATION: REGULATORY TEXT: 56-09-02 MARTIN: Applies to All Models 202, 202A, and 404 Aircraft. Compliance required by September 1, 1956. In order to eliminate shearing of rivets securing the rudder torque tube flange, P/N 2021U42196, to the rudder torque tube, P/N 2021D19331, caused by gust buffeting with gust locks not engaged and resulting in loss of adequate and/or positive rudder control, it is necessary to replace the 3/16-inch rivets with 1/4-inch 24ST heat treated rivets. (Martin Service Instruction Letters No. 202/202A-36 and No. 404-69 cover this same subject.) FOOTER:
Source: Official FAA Source ↗
Retrieved: Apr 8, 2026
Rights: U.S. Government Public Domain
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