AD 50-43-01
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| aircraft | The Boeing Company | DC-6 | Airworthiness Directives; DOUGLAS All Model DC-6 Aircraft |
| aircraft | The Boeing Company | DC-6A | Airworthiness Directives; DOUGLAS All Model DC-6 Aircraft |
| aircraft | The Boeing Company | DC-6B | Airworthiness Directives; DOUGLAS All Model DC-6 Aircraft |
Unsafe Condition
Cracks in critical areas of Goodyear main wheels, Model L20HBMF, wheel assemblies 9540049 and 9540332, such as the brake drive flange, tire bead radius, tire bead seat radius, demountable flange step, and flange returning ring groove.
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Required Actions
Remove tires from Goodyear main wheels Model L20HBMF, assemblies 9540049 and 9540332, and inspect critical areas using Zyglo or equivalent methods. Retire wheels if cracks are found.
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Compliance Time
On or before the next major inspection where facilities are available and in any event by December 15, 1950, unless already accomplished at last previous tire change, and thereafter at the regular major inspection nearest to 330 hours.
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Affected Aircraft
Douglas All Model DC-6 Aircraft with Goodyear main wheels, Model L20HBMF, wheel assemblies 9540049 and 9540332.
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Federal Register Abstract
Wheels
Applicability Source Text
Show captured applicability text from the source AD
AD Final Rules - DRS_50-43-01.html Copy URL Print/Save as PDF Document Versions Feedback Details AD Number: 50-43-01 Document Type: AD Final Rules Docket Number: Unknown Subject Heading: Airworthiness Directives; DOUGLAS All Model DC-6 Aircraft Subject: Wheels Status: Current Citation: This information is not available. Citation Publish Date: Effective Date: Make: The Boeing Company Model: DC-6 | DC-6A | DC-6B Product Type: Aircraft Product Subtype: Large Airplane Affected AD: Superseded AD: Affected By: Superseded By: Service/Office: Office of Primary Responsibility: CFR Part Reference: Part 39 Comments: AIRWORTHINESS DIRECTIVES FINAL RULES: 50-43-01 CITATION: This information is not available. PAGE NUMBER: DOCKET NUMBER: Unknown AMENDMENT: AD NUMBER: 50-43-01 SUBJECT HEADING: Airworthiness Directives; DOUGLAS All Model DC-6 Aircraft ACTION: SUMMARY: DATES: ADDRESSES: FOR FURTHER INFORMATION CONTACT: SUPPLEMENTARY INFORMATION: REGULATORY TEXT: 50-43-01 DOUGLAS: Applies to All Model DC-6 Aircraft. To be accomplished on or before the next major inspection where facilities are available and in any event by December 15, 1950, unless already accomplished at last previous tire change, and thereafter at the regular major inspection nearest to 330 hours. This inspection period may be extended to tire replacement periods by the assigned CAA Agent when the airline's service experience indicates that a satisfactory level of safety is being maintained. Remove the tires from all Goodyear main wheels, Model L20HBMF, wheel assemblies 9540049 and 9540332, and thoroughly inspect by Zyglo or equivalent methods the critical areas of the wheel, such as: 1. Brake drive flange area. 2. Tire bead radius of the fixed flange. 3. Tire bead seat radius of the demountable flange. 4. Radius of the demountable flange step. 5. The flange returning ring groove in the wheel. If cracks are found in any of the critical areas at one of these inspections, the wheel should be retired from service. FOOTER:
Document Text
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AD Final Rules - DRS_50-43-01.html Copy URL Print/Save as PDF Document Versions Feedback Details AD Number: 50-43-01 Document Type: AD Final Rules Docket Number: Unknown Subject Heading: Airworthiness Directives; DOUGLAS All Model DC-6 Aircraft Subject: Wheels Status: Current Citation: This information is not available. Citation Publish Date: Effective Date: Make: The Boeing Company Model: DC-6 | DC-6A | DC-6B 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: 50-43-01 CITATION: This information is not available. PAGE NUMBER: DOCKET NUMBER: Unknown AMENDMENT: AD NUMBER: 50-43-01 SUBJECT HEADING: Airworthiness Directives; DOUGLAS All Model DC-6 Aircraft ACTION: SUMMARY: DATES: ADDRESSES: FOR FURTHER INFORMATION CONTACT: SUPPLEMENTARY INFORMATION: REGULATORY TEXT: 50-43-01 DOUGLAS: Applies to All Model DC-6 Aircraft. To be accomplished on or before the next major inspection where facilities are available and in any event by December 15, 1950, unless already accomplished at last previous tire change, and thereafter at the regular major inspection nearest to 330 hours. This inspection period may be extended to tire replacement periods by the assigned CAA Agent when the airline's service experience indicates that a satisfactory level of safety is being maintained. Remove the tires from all Goodyear main wheels, Model L20HBMF, wheel assemblies 9540049 and 9540332, and thoroughly inspect by Zyglo or equivalent methods the critical areas of the wheel, such as: 1. Brake drive flange area. 2. Tire bead radius of the fixed flange. 3. Tire bead seat radius of the demountable flange. 4. Radius of the demountable flange step. 5. The flange returning ring groove in the wheel. If cracks are found in any of the critical areas at one of these inspections, the wheel should be retired from service. FOOTER:
Source: Official FAA Source ↗
Retrieved: Apr 8, 2026
Rights: U.S. Government Public Domain
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