AD 47-02-02
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| aircraft | The Boeing Company | C54-DC | DOUGLAS All C-54 Series Aircraft and DC-4 Aircraft |
| aircraft | The Boeing Company | C54A-DC | DOUGLAS All C-54 Series Aircraft and DC-4 Aircraft |
| aircraft | The Boeing Company | C54B-DC | DOUGLAS All C-54 Series Aircraft and DC-4 Aircraft |
| aircraft | The Boeing Company | C54D-DC | DOUGLAS All C-54 Series Aircraft and DC-4 Aircraft |
| aircraft | The Boeing Company | C54E-DC | DOUGLAS All C-54 Series Aircraft and DC-4 Aircraft |
| aircraft | The Boeing Company | C54G-DC | DOUGLAS All C-54 Series Aircraft and DC-4 Aircraft |
| aircraft | The Boeing Company | DC-4 | DOUGLAS All C-54 Series Aircraft and DC-4 Aircraft |
Unsafe Condition
Loose or stretched clevis shear bolts in the vertical stabilizer forward attach fitting (Station 953), part numbers 4106204 and -1, which may break when checked for tightness.
AI-generated summary from the source AD text. Verify against the official source before acting.
Required Actions
Inspect the clevis shear bolts in the vertical stabilizer forward attach fitting for looseness or stretching. Rework the stabilizer attaching fittings and replace the bolts with high heat-treated bolts.
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Compliance Time
not later than July 1, 1947
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Affected Aircraft
Douglas C-54 Series Aircraft and DC-4 Aircraft with serial numbers 42904 to 42943, inclusive; 42948 to 42952, inclusive; 42982 to 42996, inclusive; and 43065.
AI-generated summary from the source AD text. Verify against the official source before acting.
Federal Register Abstract
Vertical Stabilizer Forward Attach Fitting
Applicability Source Text
Show captured applicability text from the source AD
AD Final Rules - DRS_47-02-02.html Copy URL Print/Save as PDF Document Versions Feedback Details AD Number: 47-02-02 Document Type: AD Final Rules Docket Number: Unknown Subject Heading: DOUGLAS All C-54 Series Aircraft and DC-4 Aircraft Subject: Vertical Stabilizer Forward Attach Fitting 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| C54B-DC | C54D-DC | C54E-DC | C54G-DC | DC-4 Product Type: Aircraft Product Subtype: Large Airplane Affected AD: Superseded AD: Affected By: Superseded By: Service/Office: Office of Primary Responsibility: CFR Part Reference: Part 39 Comments: AIRWORTHINESS DIRECTIVES FINAL RULES: 47-02-02 CITATION: This information is not available. PAGE NUMBER: DOCKET NUMBER: Unknown AMENDMENT: AD NUMBER: 47-02-02 SUBJECT HEADING: DOUGLAS All C-54 Series Aircraft and DC-4 Aircraft ACTION: SUMMARY: DATES: ADDRESSES: FOR FURTHER INFORMATION CONTACT: SUPPLEMENTARY INFORMATION: REGULATORY TEXT: 47-02-02 DOUGLAS: (Was Mandatory Note 10 AD-762-7.) Applies to All C-54 Series Aircraft and DC-4 Aircraft, Serial Numbers 42904 to 42943, Inclusive; 42948 to 42952, Inclusive; 42982 to 42996, Inclusive; and 43065. To be accomplished not later than July 1, 1947. Inspect the clevis shear bolts in the vertical stabilizer forward attach fitting (Station 953), P/N 4106204 and -1, for loose or stretched bolts. In some instances, the lower 3/16-inch bolts, when being checked for tightness, have broken. In order to overcome the difficulty, the stabilizer attaching fittings should be reworked and bolts be replaced with high heat-treated bolts. (Douglas Service Bulletin DC-4 No. 11, covers this same subject.) FOOTER:
Document Text
Show stored source text (verify against official source)
AD Final Rules - DRS_47-02-02.html Copy URL Print/Save as PDF Document Versions Feedback Details AD Number: 47-02-02 Document Type: AD Final Rules Docket Number: Unknown Subject Heading: DOUGLAS All C-54 Series Aircraft and DC-4 Aircraft Subject: Vertical Stabilizer Forward Attach Fitting 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: 47-02-02 CITATION: This information is not available. PAGE NUMBER: DOCKET NUMBER: Unknown AMENDMENT: AD NUMBER: 47-02-02 SUBJECT HEADING: DOUGLAS All C-54 Series Aircraft and DC-4 Aircraft ACTION: SUMMARY: DATES: ADDRESSES: FOR FURTHER INFORMATION CONTACT: SUPPLEMENTARY INFORMATION: REGULATORY TEXT: 47-02-02 DOUGLAS: (Was Mandatory Note 10 AD-762-7.) Applies to All C-54 Series Aircraft and DC-4 Aircraft, Serial Numbers 42904 to 42943, Inclusive; 42948 to 42952, Inclusive; 42982 to 42996, Inclusive; and 43065. To be accomplished not later than July 1, 1947. Inspect the clevis shear bolts in the vertical stabilizer forward attach fitting (Station 953), P/N 4106204 and -1, for loose or stretched bolts. In some instances, the lower 3/16-inch bolts, when being checked for tightness, have broken. In order to overcome the difficulty, the stabilizer attaching fittings should be reworked and bolts be replaced with high heat-treated bolts. (Douglas Service Bulletin DC-4 No. 11, covers this same subject.) FOOTER:
Source: Official FAA Source ↗
Retrieved: Apr 8, 2026
Rights: U.S. Government Public Domain
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