AD 47-42-16
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| aircraft | The Boeing Company | DC-6 | Airworthiness Directives; DOUGLAS DC-6 Aircraft |
| aircraft | The Boeing Company | DC-6A | Airworthiness Directives; DOUGLAS DC-6 Aircraft |
| aircraft | The Boeing Company | DC-6B | Airworthiness Directives; DOUGLAS DC-6 Aircraft |
Unsafe Condition
Combustion chamber failure in surface combustion Model 63A66 thermal anti-icing heaters and Model A63A68 cabin and thermal anti-icing heaters could lead to heater malfunction or failure.
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Required Actions
Remove combustion chambers for inspection and pressure test at each 500-hour interval of heater operation. Carefully inspect the downstream end of the combustion chambers at each periodic inspection.
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Compliance Time
at each 500-hour interval of heater operation
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Affected Aircraft
Douglas DC-6, DC-6A, DC-6B aircraft with surface combustion Model 63A66 and Model A63A68 heaters
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Federal Register Abstract
Combustion Chamber Inspection
Applicability Source Text
Show captured applicability text from the source AD
AD Final Rules - DRS_47-42-16.html Copy URL Print/Save as PDF Document Versions Feedback Details AD Number: 47-42-16 Document Type: AD Final Rules Docket Number: Unknown Subject Heading: Airworthiness Directives; DOUGLAS DC-6 Aircraft Subject: Combustion Chamber Inspection 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The Boeing Company Model: DC-6 | DC-6A | DC-6B Product Type: Aircraft Product Subtype: Large Airplane Affected AD: Superseded AD: Affected By: Superseded By: Service/Office: Office of Primary Responsibility: CFR Part Reference: Part 39 Comments: AIRWORTHINESS DIRECTIVES FINAL RULES: 47-42-16 CITATION: This information is not available. PAGE NUMBER: DOCKET NUMBER: Unknown AMENDMENT: AD NUMBER: 47-42-16 SUBJECT HEADING: Airworthiness Directives; DOUGLAS DC-6 Aircraft ACTION: SUMMARY: DATES: ADDRESSES: FOR FURTHER INFORMATION CONTACT: SUPPLEMENTARY INFORMATION: REGULATORY TEXT: 47-42-16 DOUGLAS: (Was Service Note 2 of AD-781-1.) Applies to DC-6 Aircraft. Remove combustion chamber of surface combustion Model 63A66 thermal anti-icing heaters and Model A63A68 cabin and thermal anti-icing heaters for inspection and pressure test at each 500-hour interval of heater operation. Also carefully inspect downstream end of the combustion chambers at each periodic inspection. FOOTER:
Document Text
Show stored source text (verify against official source)
AD Final Rules - DRS_47-42-16.html Copy URL Print/Save as PDF Document Versions Feedback Details AD Number: 47-42-16 Document Type: AD Final Rules Docket Number: Unknown Subject Heading: Airworthiness Directives; DOUGLAS DC-6 Aircraft Subject: Combustion Chamber Inspection 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: 47-42-16 CITATION: This information is not available. PAGE NUMBER: DOCKET NUMBER: Unknown AMENDMENT: AD NUMBER: 47-42-16 SUBJECT HEADING: Airworthiness Directives; DOUGLAS DC-6 Aircraft ACTION: SUMMARY: DATES: ADDRESSES: FOR FURTHER INFORMATION CONTACT: SUPPLEMENTARY INFORMATION: REGULATORY TEXT: 47-42-16 DOUGLAS: (Was Service Note 2 of AD-781-1.) Applies to DC-6 Aircraft. Remove combustion chamber of surface combustion Model 63A66 thermal anti-icing heaters and Model A63A68 cabin and thermal anti-icing heaters for inspection and pressure test at each 500-hour interval of heater operation. Also carefully inspect downstream end of the combustion chambers at each periodic inspection. FOOTER:
Source: Official FAA Source ↗
Retrieved: Apr 8, 2026
Rights: U.S. Government Public Domain
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