AD 46-11-03
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| aircraft | The Boeing Company | C54-DC | DOUGLAS Model C54-DC (R5D) , C54A (R5D-1), C54B (R5D-2) and C54D-DC (R5D-3) , C54D-DC, R5D-3 Aircraft |
| aircraft | The Boeing Company | C54A-DC | DOUGLAS Model C54-DC (R5D) , C54A (R5D-1), C54B (R5D-2) and C54D-DC (R5D-3) , C54D-DC, R5D-3 Aircraft |
| aircraft | The Boeing Company | C54B-DC | DOUGLAS Model C54-DC (R5D) , C54A (R5D-1), C54B (R5D-2) and C54D-DC (R5D-3) , C54D-DC, R5D-3 Aircraft |
| aircraft | The Boeing Company | C54D-DC | DOUGLAS Model C54-DC (R5D) , C54A (R5D-1), C54B (R5D-2) and C54D-DC (R5D-3) , C54D-DC, R5D-3 Aircraft |
Unsafe Condition
The landing gear door stud shearing could prevent the landing gear from extending.
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Required Actions
Replace the old thin stud (Douglas Drawing No. 1167048) with the new thick stud (Douglas Drawing No. 1329227). Remove the thin stud from each landing gear door sleeve assembly (P/N 4167071), drill the existing stud hole to +.4459,-.4531 diameter, tap 1/2-20 NF-3 to a depth of 1/2 inch, install the new stud, and secure with a 0.063-inch drill rod pin 3/8-inch long.
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Compliance Time
not later than next engine change
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Affected Aircraft
Douglas Model C54-DC (R5D), C54A (R5D-1), C54B (R5D-2), and C54D-DC (R5D-3) airplanes built at Santa Monica (C54-DC) and Chicago up to and including C54D-DC AAF Serial Number 42-72698 and R5D-3 Navy Serial No. 56519.
AI-generated summary from the source AD text. Verify against the official source before acting.
Federal Register Abstract
Landing Gear Door Stud
Applicability Source Text
Show captured applicability text from the source AD
AD Final Rules - DRS_46-11-03.html Copy URL Print/Save as PDF Document Versions Feedback Details AD Number: 46-11-03 Document Type: AD Final Rules Docket Number: Unknown Subject Heading: DOUGLAS Model C54-DC (R5D) , C54A (R5D-1), C54B (R5D-2) and C54D-DC (R5D-3) , C54D-DC, R5D-3 Aircraft Subject: Landing Gear Door Stud 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Company Model: C54-DC | C54A-DC | C54B-DC | C54D-DC Product Type: Aircraft Product Subtype: Large Airplane Affected AD: Superseded AD: Affected By: Superseded By: Service/Office: Office of Primary Responsibility: CFR Part Reference: Part 39 Comments: AIRWORTHINESS DIRECTIVES FINAL RULES: 46-11-03 CITATION: This information is not available. PAGE NUMBER: DOCKET NUMBER: Unknown AMENDMENT: AD NUMBER: 46-11-03 SUBJECT HEADING: DOUGLAS Model C54-DC (R5D) , C54A (R5D-1), C54B (R5D-2) and C54D-DC (R5D-3) , C54D-DC, R5D-3 Aircraft ACTION: SUMMARY: DATES: ADDRESSES: FOR FURTHER INFORMATION CONTACT: SUPPLEMENTARY INFORMATION: REGULATORY TEXT: 46-11-03 DOUGLAS: (Was Mandatory Note 2 of AD-762-7.) Applies Only to All C54-DC (R5D) Airplanes Built at Santa Monica and to All C54A (R5D-1), C54B (R5D-2) and C54D-DC (R5D-3) Airplanes Built at Chicago Up to and Including C54D-DC AAF Serial Number 42-72698, and R5D-3 Navy Serial No. 56519. All Subsequent Airplanes Have Been Reworked Prior to Delivery by the Douglas Co. To be accomplished not later than next engine change. Due to the possibility of the landing gear door stud shearing and preventing the landing gear from extending, the old thin stud, Douglas Drawing No. 1167048 should be replaced with the new thick stud, Douglas Drawing No. 1329227. In order to accomplish this change the thin stud should be removed from each landing gear door sleeve assembly, P/N 4167071. The existing stud hold should be drilled to +.4459,- .4531 diameter and tapped 1/2-20 NF-3 to a depth of 1/2 inch. The new thick stud, Douglas P/N 1329227 should be installed and locked in place with an 0.063-inch drill rod pin 3/8-inch long pressed through the side of the sleeve assembly end, Drawing No. 2167063. (Douglas Service Bulletin No. C-54-275 dated January 21, 1946, covers this same subject.) FOOTER:
Document Text
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AD Final Rules - DRS_46-11-03.html Copy URL Print/Save as PDF Document Versions Feedback Details AD Number: 46-11-03 Document Type: AD Final Rules Docket Number: Unknown Subject Heading: DOUGLAS Model C54-DC (R5D) , C54A (R5D-1), C54B (R5D-2) and C54D-DC (R5D-3) , C54D-DC, R5D-3 Aircraft Subject: Landing Gear Door Stud 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 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: 46-11-03 CITATION: This information is not available. PAGE NUMBER: DOCKET NUMBER: Unknown AMENDMENT: AD NUMBER: 46-11-03 SUBJECT HEADING: DOUGLAS Model C54-DC (R5D) , C54A (R5D-1), C54B (R5D-2) and C54D-DC (R5D-3) , C54D-DC, R5D-3 Aircraft ACTION: SUMMARY: DATES: ADDRESSES: FOR FURTHER INFORMATION CONTACT: SUPPLEMENTARY INFORMATION: REGULATORY TEXT: 46-11-03 DOUGLAS: (Was Mandatory Note 2 of AD-762-7.) Applies Only to All C54-DC (R5D) Airplanes Built at Santa Monica and to All C54A (R5D-1), C54B (R5D-2) and C54D-DC (R5D-3) Airplanes Built at Chicago Up to and Including C54D-DC AAF Serial Number 42-72698, and R5D-3 Navy Serial No. 56519. All Subsequent Airplanes Have Been Reworked Prior to Delivery by the Douglas Co. To be accomplished not later than next engine change. Due to the possibility of the landing gear door stud shearing and preventing the landing gear from extending, the old thin stud, Douglas Drawing No. 1167048 should be replaced with the new thick stud, Douglas Drawing No. 1329227. In order to accomplish this change the thin stud should be removed from each landing gear door sleeve assembly, P/N 4167071. The existing stud hold should be drilled to +.4459,- .4531 diameter and tapped 1/2-20 NF-3 to a depth of 1/2 inch. The new thick stud, Douglas P/N 1329227 should be installed and locked in place with an 0.063-inch drill rod pin 3/8-inch long pressed through the side of the sleeve assembly end, Drawing No. 2167063. (Douglas Service Bulletin No. C-54-275 dated January 21, 1946, covers this same subject.) 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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