AD 52-04-02
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
Failure of inverter control protection could result in loss of electrical system protection and possible fire hazard.
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Required Actions
Provide separate protection for each inverter control and warning light circuit. Also provide separate protection for T and B warning lights in forward area.
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Compliance Time
not later than August 1, 1952
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Affected Aircraft
Martin-Marietta Corporation Models 202 and 202A Aircraft
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Federal Register Abstract
Inverter Control Protection
Applicability Source Text
Show captured applicability text from the source AD
AD Final Rules - DRS_52-04-02.html Copy URL Print/Save as PDF Document Versions Feedback Details AD Number: 52-04-02 Document Type: AD Final Rules Docket Number: Unknown Subject Heading: Martin Models 202 and 202A Aircraft Subject: Inverter Control Protection 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Make: Martin-Marietta Corporation Model: 202 | 202A Product Type: Aircraft Product Subtype: Large Airplane Affected AD: Superseded AD: Affected By: Superseded By: Service/Office: Office of Primary Responsibility: CFR Part Reference: Part 39 Comments: AIRWORTHINESS DIRECTIVES FINAL RULES: 52-04-02 CITATION: This information is not available. PAGE NUMBER: DOCKET NUMBER: Unknown AMENDMENT: AD NUMBER: 52-04-02 SUBJECT HEADING: Martin Models 202 and 202A Aircraft ACTION: SUMMARY: DATES: ADDRESSES: FOR FURTHER INFORMATION CONTACT: SUPPLEMENTARY INFORMATION: REGULATORY TEXT: 52-04-02 MARTIN: Applies to All Models 202 and 202A Aircraft. Compliance required not later than August 1, 1952. Provide separate protection for each inverter control and warning light circuit. Also provide separate protection for T and B warning lights in forward area. (Trans World Airlines Engineering Order No. 5717 covers this same subject.) FOOTER:
Document Text
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AD Final Rules - DRS_52-04-02.html Copy URL Print/Save as PDF Document Versions Feedback Details AD Number: 52-04-02 Document Type: AD Final Rules Docket Number: Unknown Subject Heading: Martin Models 202 and 202A Aircraft Subject: Inverter Control Protection 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: 52-04-02 CITATION: This information is not available. PAGE NUMBER: DOCKET NUMBER: Unknown AMENDMENT: AD NUMBER: 52-04-02 SUBJECT HEADING: Martin Models 202 and 202A Aircraft ACTION: SUMMARY: DATES: ADDRESSES: FOR FURTHER INFORMATION CONTACT: SUPPLEMENTARY INFORMATION: REGULATORY TEXT: 52-04-02 MARTIN: Applies to All Models 202 and 202A Aircraft. Compliance required not later than August 1, 1952. Provide separate protection for each inverter control and warning light circuit. Also provide separate protection for T and B warning lights in forward area. (Trans World Airlines Engineering Order No. 5717 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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