AD 47-49-07
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| aircraft | Lockheed Aircraft Corporation | 49-46 | LOCKHEED Model 49 |
Unsafe Condition
The NAS 58A65 bolt used to connect the two halves of each MLG upper drag link assembly may fail due to insufficient strength.
AI-generated summary from the source AD text. Verify against the official source before acting.
Required Actions
Replace the NAS 58A65 bolt with a 5/8-inch diameter high strength bolt (LAC P/N 297902) and reduce MLG shock strut inflation pressures to achieve a static extension of 2 inches at maximum landing weight.
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Compliance Time
prior to February 1, 1948
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Affected Aircraft
Lockheed Aircraft Corporation Model 49 serials up to and including 2088, unless equipped with MLG Drag Strut Dampers.
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Federal Register Abstract
Drag Link Bolt Replacement
Applicability Source Text
Show captured applicability text from the source AD
AD Final Rules - DRS_47-49-07.html Copy URL Print/Save as PDF Document Versions Feedback Details AD Number: 47-49-07 Document Type: AD Final Rules Docket Number: Unknown Subject Heading: LOCKHEED Model 49 Subject: Drag Link Bolt Replacement Status: Current Citation: This information is not available. Citation Publish Date: Effective Date: Make: Lockheed Aircraft Corporation Model: 49-46 Product Type: Aircraft Product Subtype: Large Airplane Affected AD: Superseded AD: Affected By: Superseded By: Service/Office: Office of Primary Responsibility: CFR Part Reference: Part 39 Comments: AIRWORTHINESS DIRECTIVES FINAL RULES: 47-49-07 CITATION: This information is not available. PAGE NUMBER: DOCKET NUMBER: Unknown AMENDMENT: AD NUMBER: 47-49-07 SUBJECT HEADING: LOCKHEED Model 49 ACTION: SUMMARY: DATES: ADDRESSES: FOR FURTHER INFORMATION CONTACT: SUPPLEMENTARY INFORMATION: REGULATORY TEXT: 47-49-07 LOCKHEED: (Was Mandatory Note 40 of AD-763-3.) Applies to All Model 49 Serials Up to and Including 2088, Unless Equipped With MLG Drag Strut Dampers. Compliance required prior to February 1, 1948. (a) Replace the NAS 58A65 bolt used to connect the two halves of each MLG upper drag link assembly, LAC P/N 283418 and 288983, with a 5/8-inch diameter high strength bolt, LAC P/N 297902. (LAC Service Bulletin 49/SB-368 covers installation of MLG shock strut dampers.) (b) Reduce MLG shock strut inflation pressures to provide a static extension of 2 inches at maximum landing weight. FOOTER:
Document Text
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AD Final Rules - DRS_47-49-07.html Copy URL Print/Save as PDF Document Versions Feedback Details AD Number: 47-49-07 Document Type: AD Final Rules Docket Number: Unknown Subject Heading: LOCKHEED Model 49 Subject: Drag Link Bolt Replacement Status: Current Citation: This information is not available. Citation Publish Date: Effective Date: Make: Lockheed Aircraft Corporation Model: 49-46 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: 47-49-07 CITATION: This information is not available. PAGE NUMBER: DOCKET NUMBER: Unknown AMENDMENT: AD NUMBER: 47-49-07 SUBJECT HEADING: LOCKHEED Model 49 ACTION: SUMMARY: DATES: ADDRESSES: FOR FURTHER INFORMATION CONTACT: SUPPLEMENTARY INFORMATION: REGULATORY TEXT: 47-49-07 LOCKHEED: (Was Mandatory Note 40 of AD-763-3.) Applies to All Model 49 Serials Up to and Including 2088, Unless Equipped With MLG Drag Strut Dampers. Compliance required prior to February 1, 1948. (a) Replace the NAS 58A65 bolt used to connect the two halves of each MLG upper drag link assembly, LAC P/N 283418 and 288983, with a 5/8-inch diameter high strength bolt, LAC P/N 297902. (LAC Service Bulletin 49/SB-368 covers installation of MLG shock strut dampers.) (b) Reduce MLG shock strut inflation pressures to provide a static extension of 2 inches at maximum landing weight. 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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