AD 49-33-01
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| aircraft | The Boeing Company | DC-6 | Airworthiness Directives; DOUGLAS All Model DC-6 Airplanes |
| aircraft | The Boeing Company | DC-6A | Airworthiness Directives; DOUGLAS All Model DC-6 Airplanes |
| aircraft | The Boeing Company | DC-6B | Airworthiness Directives; DOUGLAS All Model DC-6 Airplanes |
Unsafe Condition
Hamilton Standard Model 43D60/6851A-O propeller blades may experience fatigue failure if operated beyond 3,500 hours without remachining and reshotpeening, or if they have damage affecting face or edge alignment.
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Required Actions
Do not operate propeller blades beyond 3,500 hours unless taper-bores are remachined and reshotpeened by the manufacturer. Withdraw blades with damage altering face or edge alignment from service until manufacturer's test program results.
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Compliance Time
not later than September 10, 1949
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Affected Aircraft
Douglas All Model DC-6 Airplanes equipped with Hamilton Standard Model 43D60/6851A-O props
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Federal Register Abstract
Hamilton Standard Propeller Blades
Applicability Source Text
Show captured applicability text from the source AD
AD Final Rules - DRS_49-33-01.html Copy URL Print/Save as PDF Document Versions Feedback Details AD Number: 49-33-01 Document Type: AD Final Rules Docket Number: Unknown Subject Heading: Airworthiness Directives; DOUGLAS All Model DC-6 Airplanes Subject: Hamilton Standard Propeller Blades 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The Boeing Company Model: DC-6 | DC-6A | DC-6B Product Type: Aircraft Product Subtype: Large Airplane Affected AD: Superseded AD: Affected By: Superseded By: Service/Office: Office of Primary Responsibility: CFR Part Reference: Part 39 Comments: AIRWORTHINESS DIRECTIVES FINAL RULES: 49-33-01 CITATION: This information is not available. PAGE NUMBER: DOCKET NUMBER: Unknown AMENDMENT: AD NUMBER: 49-33-01 SUBJECT HEADING: Airworthiness Directives; DOUGLAS All Model DC-6 Airplanes ACTION: SUMMARY: DATES: ADDRESSES: FOR FURTHER INFORMATION CONTACT: SUPPLEMENTARY INFORMATION: REGULATORY TEXT: 49-33-01 DOUGLAS: Applies to All Model DC-6 Airplanes Equipped With Hamilton Standard Model 43D60/6851A-O Props. Compliance required not later than September 10, 1949. As a precautionary measure against fatigue failure, Hamilton Standard Model 43D60/6851A-O propeller blades may not be operated in excess of 3,500 hours unless the taper-bores have been remachined and reshotpeened by the manufacturer. In addition, any blades of this model which have sustained damage sufficient to change their face or edge alignment shall be withdrawn from service pending final results of manufacturer's test program. FOOTER:
Document Text
Show stored source text (verify against official source)
AD Final Rules - DRS_49-33-01.html Copy URL Print/Save as PDF Document Versions Feedback Details AD Number: 49-33-01 Document Type: AD Final Rules Docket Number: Unknown Subject Heading: Airworthiness Directives; DOUGLAS All Model DC-6 Airplanes Subject: Hamilton Standard Propeller Blades 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: 49-33-01 CITATION: This information is not available. PAGE NUMBER: DOCKET NUMBER: Unknown AMENDMENT: AD NUMBER: 49-33-01 SUBJECT HEADING: Airworthiness Directives; DOUGLAS All Model DC-6 Airplanes ACTION: SUMMARY: DATES: ADDRESSES: FOR FURTHER INFORMATION CONTACT: SUPPLEMENTARY INFORMATION: REGULATORY TEXT: 49-33-01 DOUGLAS: Applies to All Model DC-6 Airplanes Equipped With Hamilton Standard Model 43D60/6851A-O Props. Compliance required not later than September 10, 1949. As a precautionary measure against fatigue failure, Hamilton Standard Model 43D60/6851A-O propeller blades may not be operated in excess of 3,500 hours unless the taper-bores have been remachined and reshotpeened by the manufacturer. In addition, any blades of this model which have sustained damage sufficient to change their face or edge alignment shall be withdrawn from service pending final results of manufacturer's test program. FOOTER:
Source: Official FAA Source ↗
Retrieved: Apr 8, 2026
Rights: U.S. Government Public Domain
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