AD 58-11-02
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| aircraft | Lockheed Aircraft Corporation | 18 | LOCKHEED Model 18 Aircraft |
Unsafe Condition
Cracks in the welds of the drag strut yoke (P/N XY450-2L-1) on the main landing gear result in continuing reduction in the strength of the landing gear, rendering it unairworthy.
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Required Actions
Inspect the main landing gear for cracks using dye penetrant, magnetic particle, or equivalent methods by July 1, 1958, and every 500 hours of operation thereafter. Conduct a visual inspection with an 8-power magnifying glass or equivalent every 100 hours of operation. Replace the oleo strut if cracks are found.
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Compliance Time
Not later than July 1, 1958, and at each 500 hours of operation thereafter; visual inspections every 100 hours of operation.
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Affected Aircraft
Lockheed Aircraft Corporation Model 18 Aircraft, all serial numbers.
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Federal Register Abstract
Landing Gear Drag Strut Yoke
Applicability Source Text
Show captured applicability text from the source AD
AD Final Rules - DRS_58-11-02.html Copy URL Print/Save as PDF Document Versions Feedback Details AD Number: 58-11-02 Document Type: AD Final Rules Docket Number: Unknown Subject Heading: LOCKHEED Model 18 Aircraft Subject: Landing Gear Drag Strut Yoke Status: Current Citation: This information is not available. Citation Publish Date: Effective Date: Make: Lockheed Aircraft Corporation Model: 18 Product Type: Aircraft Product Subtype: Large Airplane Affected AD: Superseded AD: Affected By: Superseded By: Service/Office: Office of Primary Responsibility: CFR Part Reference: Part 39 Comments: AIRWORTHINESS DIRECTIVES FINAL RULES: 58-11-02 CITATION: This information is not available. PAGE NUMBER: DOCKET NUMBER: Unknown AMENDMENT: AD NUMBER: 58-11-02 SUBJECT HEADING: LOCKHEED Model 18 Aircraft ACTION: SUMMARY: DATES: ADDRESSES: FOR FURTHER INFORMATION CONTACT: SUPPLEMENTARY INFORMATION: REGULATORY TEXT: 58-11-02 LOCKHEED: Applies to All Model 18 Aircraft. Compliance required as indicated. A number of reports has been received relative to cracks in the welds of the drag strut yoke (P/N XY450-2L-1) on the main landing gear. These cracks, as they progress, result in continuing reduction in the strength of the landing gear and hence render the landing gear unairworthy. It is, therefore, necessary to inspect the main landing gear for cracks in the area indicated as follows: 1. Not later than July 1, 1958, and at each 500 hours of operation thereafter inspect the main landing gear by means of dye penetrant, magnetic particle or equivalent. 2. At each 100 hours of operation conduct a visual inspection using an 8-power magnifying glass or equivalent. In the event cracks are found, the oleo strut must be replaced. If the oleo strut is replaced by a new part the above inspections need not be resumed until after 3,000 hours of service. For the purpose of compliance with this airworthiness directive, X-ray inspection is not considered an equivalent of dye penetrant or magnetic particle inspection. This supersedes AD 58-07-02. FOOTER:
Document Text
Show stored source text (verify against official source)
AD Final Rules - DRS_58-11-02.html Copy URL Print/Save as PDF Document Versions Feedback Details AD Number: 58-11-02 Document Type: AD Final Rules Docket Number: Unknown Subject Heading: LOCKHEED Model 18 Aircraft Subject: Landing Gear Drag Strut Yoke Status: Current Citation: This information is not available. Citation Publish Date: Effective Date: Make: Lockheed Aircraft Corporation Model: 18 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: 58-11-02 CITATION: This information is not available. PAGE NUMBER: DOCKET NUMBER: Unknown AMENDMENT: AD NUMBER: 58-11-02 SUBJECT HEADING: LOCKHEED Model 18 Aircraft ACTION: SUMMARY: DATES: ADDRESSES: FOR FURTHER INFORMATION CONTACT: SUPPLEMENTARY INFORMATION: REGULATORY TEXT: 58-11-02 LOCKHEED: Applies to All Model 18 Aircraft. Compliance required as indicated. A number of reports has been received relative to cracks in the welds of the drag strut yoke (P/N XY450-2L-1) on the main landing gear. These cracks, as they progress, result in continuing reduction in the strength of the landing gear and hence render the landing gear unairworthy. It is, therefore, necessary to inspect the main landing gear for cracks in the area indicated as follows: 1. Not later than July 1, 1958, and at each 500 hours of operation thereafter inspect the main landing gear by means of dye penetrant, magnetic particle or equivalent. 2. At each 100 hours of operation conduct a visual inspection using an 8-power magnifying glass or equivalent. In the event cracks are found, the oleo strut must be replaced. If the oleo strut is replaced by a new part the above inspections need not be resumed until after 3,000 hours of service. For the purpose of compliance with this airworthiness directive, X-ray inspection is not considered an equivalent of dye penetrant or magnetic particle inspection. This supersedes AD 58-07-02. FOOTER:
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Retrieved: Apr 8, 2026
Rights: U.S. Government Public Domain
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