AD 46-27-02
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| aircraft | The Boeing Company | C54-DC | DOUGLAS Model C-54 and DC-4 Aircraft |
| aircraft | The Boeing Company | C54A-DC | DOUGLAS Model C-54 and DC-4 Aircraft |
| aircraft | The Boeing Company | C54B-DC | DOUGLAS Model C-54 and DC-4 Aircraft |
| aircraft | The Boeing Company | C54D-DC | DOUGLAS Model C-54 and DC-4 Aircraft |
| aircraft | The Boeing Company | C54E-DC | DOUGLAS Model C-54 and DC-4 Aircraft |
| aircraft | The Boeing Company | C54G-DC | DOUGLAS Model C-54 and DC-4 Aircraft |
| aircraft | The Boeing Company | DC-4 | DOUGLAS Model C-54 and DC-4 Aircraft |
Unsafe Condition
Cracks occurring in the nose wheel brace strut collar, P/N 5102824, in the region where the steering lugs meet the collar body.
AI-generated summary from the source AD text. Verify against the official source before acting.
Required Actions
Inspect the nose wheel brace strut collar immediately and at intervals not to exceed 35 hours. If cracks are found, repair as per Douglas Service Bulletin C-54-209S dated May 31, 1946. Installation of steel brace rods per Douglas Service Bulletin C-54-209S dated August 12, 1946, is recommended but not mandatory.
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Compliance Time
immediately
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Affected Aircraft
Douglas Model C-54 and DC-4 Aircraft with nose wheel brace strut collar P/N 5102824.
AI-generated summary from the source AD text. Verify against the official source before acting.
Federal Register Abstract
Nose Wheel Brace Strut Collar
Applicability Source Text
Show captured applicability text from the source AD
AD Final Rules - DRS_46-27-02.html Copy URL Print/Save as PDF Document Versions Feedback Details AD Number: 46-27-02 Document Type: AD Final Rules Docket Number: Unknown Subject Heading: DOUGLAS Model C-54 and DC-4 Aircraft Subject: Nose Wheel Brace Strut Collar 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| C54B-DC | C54D-DC | C54E-DC | C54G-DC | DC-4 Product Type: Aircraft Product Subtype: Large Airplane Affected AD: Superseded AD: Affected By: Superseded By: Service/Office: Office of Primary Responsibility: CFR Part Reference: Part 39 Comments: AIRWORTHINESS DIRECTIVES FINAL RULES: 46-27-02 CITATION: This information is not available. PAGE NUMBER: DOCKET NUMBER: Unknown AMENDMENT: AD NUMBER: 46-27-02 SUBJECT HEADING: DOUGLAS Model C-54 and DC-4 Aircraft ACTION: SUMMARY: DATES: ADDRESSES: FOR FURTHER INFORMATION CONTACT: SUPPLEMENTARY INFORMATION: REGULATORY TEXT: 46-27-02 DOUGLAS: (Was Mandatory Note 4 of AD-762-7.) Applies to C-54 and DC-4 Aircraft. Inspection to be accomplished immediately and at periods not to exceed 35 hours thereafter. Numerous reports have been received of cracks occurring in the nose wheel brace strut collar, P/N 5102824, in the region where the steering lugs meet the collar body. If cracks are found, repairs should be made as outlined in Douglas Service Bulletin C-54-209S (Supplement) dated May 31, 1946. After repairs have been accomplished, inspection must be continued at intervals not to exceed 35 hours. Douglas Service Bulletin C-54-209S (Supplement) dated August 12, 1946, contains the information which is included in the supplement dated May 31, 1946. In addition, the later supplement outlines a method for the installation of steel brace rods to the nose wheel brace strut collar. Although the addition of the steel brace rods is not mandatory, it is recommended by the Douglas Co. If the steel brace rod installation has been incorporated in addition to the rework to the nose wheel brace strut collar which is required in the above paragraph, the 35-hour periodic inspections will not be required. FOOTER:
Document Text
Show stored source text (verify against official source)
AD Final Rules - DRS_46-27-02.html Copy URL Print/Save as PDF Document Versions Feedback Details AD Number: 46-27-02 Document Type: AD Final Rules Docket Number: Unknown Subject Heading: DOUGLAS Model C-54 and DC-4 Aircraft Subject: Nose Wheel Brace Strut Collar 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 | DC-4 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: 46-27-02 CITATION: This information is not available. PAGE NUMBER: DOCKET NUMBER: Unknown AMENDMENT: AD NUMBER: 46-27-02 SUBJECT HEADING: DOUGLAS Model C-54 and DC-4 Aircraft ACTION: SUMMARY: DATES: ADDRESSES: FOR FURTHER INFORMATION CONTACT: SUPPLEMENTARY INFORMATION: REGULATORY TEXT: 46-27-02 DOUGLAS: (Was Mandatory Note 4 of AD-762-7.) Applies to C-54 and DC-4 Aircraft. Inspection to be accomplished immediately and at periods not to exceed 35 hours thereafter. Numerous reports have been received of cracks occurring in the nose wheel brace strut collar, P/N 5102824, in the region where the steering lugs meet the collar body. If cracks are found, repairs should be made as outlined in Douglas Service Bulletin C-54-209S (Supplement) dated May 31, 1946. After repairs have been accomplished, inspection must be continued at intervals not to exceed 35 hours. Douglas Service Bulletin C-54-209S (Supplement) dated August 12, 1946, contains the information which is included in the supplement dated May 31, 1946. In addition, the later supplement outlines a method for the installation of steel brace rods to the nose wheel brace strut collar. Although the addition of the steel brace rods is not mandatory, it is recommended by the Douglas Co. If the steel brace rod installation has been incorporated in addition to the rework to the nose wheel brace strut collar which is required in the above paragraph, the 35-hour periodic inspections will not be required. 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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