AD 47-42-14
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| aircraft | The Boeing Company | DC-6 | Airworthiness Directives; DOUGLAS DC-6 |
| aircraft | The Boeing Company | DC-6A | Airworthiness Directives; DOUGLAS DC-6 |
| aircraft | The Boeing Company | DC-6B | Airworthiness Directives; DOUGLAS DC-6 |
Unsafe Condition
Bearing failures in the voltage regulator blowers due to lubricant Z815.
AI-generated summary from the source AD text. Verify against the official source before acting.
Required Actions
Replace bearings previously packed with lubricant Z815 with new bearings containing lubricant Z801. Follow Douglas Service Bulletin DC-6 No. 43 for complete rework.
AI-generated summary from the source AD text. Verify against the official source before acting.
Compliance Time
not later than first blower overhaul after January 1, 1948
AI-generated summary from the source AD text. Verify against the official source before acting.
Affected Aircraft
Douglas DC-6 models with serial numbers 42854 to 42880, inclusive; 42882 to 42884, inclusive; 43000 and 43001.
AI-generated summary from the source AD text. Verify against the official source before acting.
Federal Register Abstract
Voltage Regulator Bearings
Applicability Source Text
Show captured applicability text from the source AD
AD Final Rules - DRS_47-42-14.html Copy URL Print/Save as PDF Document Versions Feedback Details AD Number: 47-42-14 Document Type: AD Final Rules Docket Number: Unknown Subject Heading: Airworthiness Directives; DOUGLAS DC-6 Subject: Voltage Regulator Bearings 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The Boeing Company Model: DC-6 | DC-6A | DC-6B Product Type: Aircraft Product Subtype: Large Airplane Affected AD: Superseded AD: Affected By: Superseded By: Service/Office: Office of Primary Responsibility: CFR Part Reference: Part 39 Comments: AIRWORTHINESS DIRECTIVES FINAL RULES: 47-42-14 CITATION: This information is not available. PAGE NUMBER: DOCKET NUMBER: Unknown AMENDMENT: AD NUMBER: 47-42-14 SUBJECT HEADING: Airworthiness Directives; DOUGLAS DC-6 ACTION: SUMMARY: DATES: ADDRESSES: FOR FURTHER INFORMATION CONTACT: SUPPLEMENTARY INFORMATION: REGULATORY TEXT: 47-42-14 DOUGLAS: (Was Mandatory Note 11 of AD-781-1.) Applies to DC-6 Serial Numbers 42854 to 42880, Inclusive; 42882 to 42884, Inclusive; 43000 and 43001. To be accomplished not later than first blower overhaul after January 1, 1948. To prevent bearing failures in the voltage regulator blowers, replace the bearings formerly packed with lubricant Z815 with new bearings containing lubricant Z801. (Douglas Service Bulletin DC-6 No. 43 describes the complete rework.) FOOTER:
Document Text
Show stored source text (verify against official source)
AD Final Rules - DRS_47-42-14.html Copy URL Print/Save as PDF Document Versions Feedback Details AD Number: 47-42-14 Document Type: AD Final Rules Docket Number: Unknown Subject Heading: Airworthiness Directives; DOUGLAS DC-6 Subject: Voltage Regulator Bearings 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: 47-42-14 CITATION: This information is not available. PAGE NUMBER: DOCKET NUMBER: Unknown AMENDMENT: AD NUMBER: 47-42-14 SUBJECT HEADING: Airworthiness Directives; DOUGLAS DC-6 ACTION: SUMMARY: DATES: ADDRESSES: FOR FURTHER INFORMATION CONTACT: SUPPLEMENTARY INFORMATION: REGULATORY TEXT: 47-42-14 DOUGLAS: (Was Mandatory Note 11 of AD-781-1.) Applies to DC-6 Serial Numbers 42854 to 42880, Inclusive; 42882 to 42884, Inclusive; 43000 and 43001. To be accomplished not later than first blower overhaul after January 1, 1948. To prevent bearing failures in the voltage regulator blowers, replace the bearings formerly packed with lubricant Z815 with new bearings containing lubricant Z801. (Douglas Service Bulletin DC-6 No. 43 describes the complete rework.) FOOTER:
Source: Official FAA Source ↗
Retrieved: Apr 8, 2026
Rights: U.S. Government Public Domain
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