AD 51-03-02
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| aircraft | Martin-Marietta Corporation | 202 | Martin Models 202 and 202A Aircraft |
| aircraft | Martin-Marietta Corporation | 202A | Martin Models 202 and 202A Aircraft |
Unsafe Condition
Cracks in main landing gear crankshafts (P/N 202SD82019 and 202SD82021) due to reported occurrences.
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Required Actions
Replace main landing gear crankshafts with new ones bearing the same part numbers and having a ground radius around the periphery of the hole for the retract pin.
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Compliance Time
By April 1, 1951, for aircraft with main landing gears having 4,000 hours service or more, and thereafter every 4,360 cycles of landing gear operation.
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Affected Aircraft
Martin-Marietta Corporation Models 202 and 202A Aircraft with main landing gears having 4,000 hours service or more.
AI-generated summary from the source AD text. Verify against the official source before acting.
Federal Register Abstract
Landing Gear Crankshafts
Applicability Source Text
Show captured applicability text from the source AD
AD Final Rules - DRS_51-03-02.html Copy URL Print/Save as PDF Document Versions Feedback Details AD Number: 51-03-02 Document Type: AD Final Rules Docket Number: Unknown Subject Heading: Martin Models 202 and 202A Aircraft Subject: Landing Gear Crankshafts Status: Current Citation: This information is not available. Citation Publish Date: Effective Date: Make: Martin-Marietta Corporation Model: 202 | 202A Product Type: Aircraft Product Subtype: Large Airplane Affected AD: Superseded AD: Affected By: Superseded By: Service/Office: Office of Primary Responsibility: CFR Part Reference: Part 39 Comments: AIRWORTHINESS DIRECTIVES FINAL RULES: 51-03-02 CITATION: This information is not available. PAGE NUMBER: DOCKET NUMBER: Unknown AMENDMENT: AD NUMBER: 51-03-02 SUBJECT HEADING: Martin Models 202 and 202A Aircraft ACTION: SUMMARY: DATES: ADDRESSES: FOR FURTHER INFORMATION CONTACT: SUPPLEMENTARY INFORMATION: REGULATORY TEXT: 51-03-02 MARTIN: Applies to All Models 202 and 202A Aircraft. Compliance required by April 1, 1951, on all aircraft having main landing gears with 4,000 hours service or more, and thereafter every 4,360 cycles of landing gear operation. Due to reported occurrences of cracks, the main landing gear crankshafts (P/N 202SD82019 and 202SD82021) should be replaced with new crankshafts bearing the same part numbers and having a ground radius around the periphery of the hole for the retract pin. (Martin Service Bulletin No. 128, dated October 4, 1950, covers this same subject.) FOOTER:
Document Text
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AD Final Rules - DRS_51-03-02.html Copy URL Print/Save as PDF Document Versions Feedback Details AD Number: 51-03-02 Document Type: AD Final Rules Docket Number: Unknown Subject Heading: Martin Models 202 and 202A Aircraft Subject: Landing Gear Crankshafts Status: Current Citation: This information is not available. Citation Publish Date: Effective Date: Make: Martin-Marietta Corporation Model: 202 | 202A 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: 51-03-02 CITATION: This information is not available. PAGE NUMBER: DOCKET NUMBER: Unknown AMENDMENT: AD NUMBER: 51-03-02 SUBJECT HEADING: Martin Models 202 and 202A Aircraft ACTION: SUMMARY: DATES: ADDRESSES: FOR FURTHER INFORMATION CONTACT: SUPPLEMENTARY INFORMATION: REGULATORY TEXT: 51-03-02 MARTIN: Applies to All Models 202 and 202A Aircraft. Compliance required by April 1, 1951, on all aircraft having main landing gears with 4,000 hours service or more, and thereafter every 4,360 cycles of landing gear operation. Due to reported occurrences of cracks, the main landing gear crankshafts (P/N 202SD82019 and 202SD82021) should be replaced with new crankshafts bearing the same part numbers and having a ground radius around the periphery of the hole for the retract pin. (Martin Service Bulletin No. 128, dated October 4, 1950, covers this same subject.) FOOTER:
Source: Official FAA Source ↗
Retrieved: Apr 8, 2026
Rights: U.S. Government Public Domain
This site is not affiliated with or endorsed by the FAA. Always verify with official sources.
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