AD 46-27-01
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| aircraft | The Boeing Company | C54-DC | DOUGLAS Model C-54 Series Aircraft. |
| aircraft | The Boeing Company | C54A-DC | DOUGLAS Model C-54 Series Aircraft. |
| aircraft | The Boeing Company | C54B-DC | DOUGLAS Model C-54 Series Aircraft. |
| aircraft | The Boeing Company | C54D-DC | DOUGLAS Model C-54 Series Aircraft. |
| aircraft | The Boeing Company | C54E-DC | DOUGLAS Model C-54 Series Aircraft. |
| aircraft | The Boeing Company | C54G-DC | DOUGLAS Model C-54 Series Aircraft. |
Unsafe Condition
Cracks may develop in the spar webs of the wing integral tank area which might not be detected, leading to fuel leakage.
AI-generated summary from the source AD text. Verify against the official source before acting.
Required Actions
Inspect immediately the spar webs in the wing integral tank area to check if Douglas Service Bulletin C-54-205 reinforcements are installed. If not installed, add reinforcements by November 1, 1946. Pending rework, operate only if daily inspections confirm no leakage and fuel is carried in outer wing tanks.
AI-generated summary from the source AD text. Verify against the official source before acting.
Compliance Time
not later than November 1, 1946
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Affected Aircraft
The Boeing Company Model C54-DC, C54A-DC, C54B-DC, C54D-DC, C54E-DC, C54G-DC aircraft
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Federal Register Abstract
Spar Webs
Applicability Source Text
Show captured applicability text from the source AD
AD Final Rules - DRS_46-27-01.html Copy URL Print/Save as PDF Document Versions Feedback Details AD Number: 46-27-01 Document Type: AD Final Rules Docket Number: Unknown Subject Heading: DOUGLAS Model C-54 Series Aircraft. Subject: Spar Webs Status: Current Citation: This information is not available. Citation Publish Date: Effective Date: Make: The Boeing Company Model: C54-DC | C54A-DC | C54B-DC | C54D-DC | C54E-DC | C54G-DC Product Type: Aircraft Product Subtype: Large Airplane Affected AD: Superseded AD: Affected By: Superseded By: Service/Office: Office of Primary Responsibility: CFR Part Reference: Part 39 Comments: AIRWORTHINESS DIRECTIVES FINAL RULES: 46-27-01 CITATION: This information is not available. PAGE NUMBER: DOCKET NUMBER: Unknown AMENDMENT: AD NUMBER: 46-27-01 SUBJECT HEADING: DOUGLAS Model C-54 Series Aircraft. ACTION: SUMMARY: DATES: ADDRESSES: FOR FURTHER INFORMATION CONTACT: SUPPLEMENTARY INFORMATION: REGULATORY TEXT: 46-27-01 DOUGLAS: (Was Mandatory Note 5 of AD-762-7.) Applies to C-54 Series Aircraft. To be accomplished not later than November 1, 1946. Inspect immediately the spar webs in the wing integral tank area to ascertain if reinforcements have been installed in accordance with Douglas Service Bulletin C-54-205 dated October 1, 1945. If not already installed, reinforcements must be added by November 1, 1946. Pending rework, airplanes which do not have reinforcements may be operated if daily inspection shows there is no leakage. Fuel should be carried in outer wing tanks as cracks may develop that might not be detected. FOOTER:
Document Text
Show stored source text (verify against official source)
AD Final Rules - DRS_46-27-01.html Copy URL Print/Save as PDF Document Versions Feedback Details AD Number: 46-27-01 Document Type: AD Final Rules Docket Number: Unknown Subject Heading: DOUGLAS Model C-54 Series Aircraft. Subject: Spar Webs Status: Current Citation: This information is not available. Citation Publish Date: Effective Date: Make: The Boeing Company Model: C54-DC | C54A-DC | C54B-DC | C54D-DC | C54E-DC | C54G-DC 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: 46-27-01 CITATION: This information is not available. PAGE NUMBER: DOCKET NUMBER: Unknown AMENDMENT: AD NUMBER: 46-27-01 SUBJECT HEADING: DOUGLAS Model C-54 Series Aircraft. ACTION: SUMMARY: DATES: ADDRESSES: FOR FURTHER INFORMATION CONTACT: SUPPLEMENTARY INFORMATION: REGULATORY TEXT: 46-27-01 DOUGLAS: (Was Mandatory Note 5 of AD-762-7.) Applies to C-54 Series Aircraft. To be accomplished not later than November 1, 1946. Inspect immediately the spar webs in the wing integral tank area to ascertain if reinforcements have been installed in accordance with Douglas Service Bulletin C-54-205 dated October 1, 1945. If not already installed, reinforcements must be added by November 1, 1946. Pending rework, airplanes which do not have reinforcements may be operated if daily inspection shows there is no leakage. Fuel should be carried in outer wing tanks as cracks may develop that might not be detected. FOOTER:
Source: Official FAA Source ↗
Retrieved: Apr 8, 2026
Rights: U.S. Government Public Domain
This site is not affiliated with or endorsed by the FAA. Always verify with official sources.
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