AD 52-04-06
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
The cabin heater lights and switch are not located in the cockpit, which could lead to inadequate monitoring and potential heater system failures.
AI-generated summary from the source AD text. Verify against the official source before acting.
Required Actions
Relocate the cabin heater fuel failure light, low heat warning light, and MANUAL-OFF-AUTO switch to the cockpit. Use G. L. Martin Service Bulletin 110 and Trans World Airlines Engineering Orders Nos. 5422 and 5820 for compliance.
AI-generated summary from the source AD text. Verify against the official source before acting.
Compliance Time
not later than May 1, 1952
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Affected Aircraft
Martin-Marietta Corporation Models 202 and 202A Aircraft, all serial numbers
AI-generated summary from the source AD text. Verify against the official source before acting.
Federal Register Abstract
Cabin Heater Lights And Switch
Applicability Source Text
Show captured applicability text from the source AD
AD Final Rules - DRS_52-04-06.html Copy URL Print/Save as PDF Document Versions Feedback Details AD Number: 52-04-06 Document Type: AD Final Rules Docket Number: Unknown Subject Heading: MARTIN Models 202 and 202A Aircraft Subject: Cabin Heater Lights And Switch 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Make: Martin-Marietta Corporation Model: 202 | 202A Product Type: Aircraft Product Subtype: Large Airplane Affected AD: Superseded AD: Affected By: Superseded By: Service/Office: Office of Primary Responsibility: CFR Part Reference: Part 39 Comments: AIRWORTHINESS DIRECTIVES FINAL RULES: 52-04-06 CITATION: This information is not available. PAGE NUMBER: DOCKET NUMBER: Unknown AMENDMENT: AD NUMBER: 52-04-06 SUBJECT HEADING: MARTIN Models 202 and 202A Aircraft ACTION: SUMMARY: DATES: ADDRESSES: FOR FURTHER INFORMATION CONTACT: SUPPLEMENTARY INFORMATION: REGULATORY TEXT: 52-04-06 MARTIN: Applies to All Models 202 and 202A Aircraft. Compliance required not later than May 1, 1952. Relocate the cabin heater (1) fuel failure light, (2) low heat warning light and (3) MANUAL-OFF-AUTO switch to the cockpit. (G. L. Martin Service Bulletin 110 issued for the 202A together with Trans World Airlines Engineering Orders Nos. 5422 and 5820 cover this same subject and can be used for both 202 and 202A.) FOOTER:
Document Text
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AD Final Rules - DRS_52-04-06.html Copy URL Print/Save as PDF Document Versions Feedback Details AD Number: 52-04-06 Document Type: AD Final Rules Docket Number: Unknown Subject Heading: MARTIN Models 202 and 202A Aircraft Subject: Cabin Heater Lights And Switch 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: 52-04-06 CITATION: This information is not available. PAGE NUMBER: DOCKET NUMBER: Unknown AMENDMENT: AD NUMBER: 52-04-06 SUBJECT HEADING: MARTIN Models 202 and 202A Aircraft ACTION: SUMMARY: DATES: ADDRESSES: FOR FURTHER INFORMATION CONTACT: SUPPLEMENTARY INFORMATION: REGULATORY TEXT: 52-04-06 MARTIN: Applies to All Models 202 and 202A Aircraft. Compliance required not later than May 1, 1952. Relocate the cabin heater (1) fuel failure light, (2) low heat warning light and (3) MANUAL-OFF-AUTO switch to the cockpit. (G. L. Martin Service Bulletin 110 issued for the 202A together with Trans World Airlines Engineering Orders Nos. 5422 and 5820 cover this same subject and can be used for both 202 and 202A.) 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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