AD 47-41-05
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| aircraft | Scotts-Bell 47 Inc | 47B | Airworthiness Directives; Bell Model 47B Series Airplanes |
| aircraft | Scotts-Bell 47 Inc | 47B3 | Airworthiness Directives; Bell Model 47B Series Airplanes |
Unsafe Condition
Fiber bearing seals in the gimbal ring may not securely lock the bearings, leading to bearing failure.
AI-generated summary from the source AD text. Verify against the official source before acting.
Required Actions
Replace fiber bearing seals with steel bearing seals, part number 27-120-127-1, following Bell Service Bulletin 47C30 dated July 10, 1947.
AI-generated summary from the source AD text. Verify against the official source before acting.
Compliance Time
next 100-hour inspection
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Affected Aircraft
Scotts-Bell 47 Inc Model 47B and 47B3 aircraft through serial number 78.
AI-generated summary from the source AD text. Verify against the official source before acting.
Federal Register Abstract
Gimbal Ring Bearing Seals
Applicability Source Text
Show captured applicability text from the source AD
AD Final Rules - DRS_47-41-05.html Copy URL Print/Save as PDF Document Versions Feedback Details AD Number: 47-41-05 Document Type: AD Final Rules Docket Number: Unknown Subject Heading: Airworthiness Directives; Bell Model 47B Series Airplanes Subject: Gimbal Ring Bearing Seals Status: Current Citation: This information is not available. Citation Publish Date: Effective Date: Make: Scotts-Bell 47 Inc Model: 47B | 47B3 Product Type: Aircraft Product Subtype: Rotorcraft Affected AD: Superseded AD: Affected By: Superseded By: Service/Office: Office of Primary Responsibility: CFR Part Reference: Part 39 Comments: AIRWORTHINESS DIRECTIVES FINAL RULES: 47-41-05 CITATION: This information is not available. PAGE NUMBER: DOCKET NUMBER: Unknown AMENDMENT: AD NUMBER: 47-41-05 SUBJECT HEADING: Airworthiness Directives; Bell Model 47B Series Airplanes ACTION: SUMMARY: DATES: ADDRESSES: FOR FURTHER INFORMATION CONTACT: SUPPLEMENTARY INFORMATION: REGULATORY TEXT: 47-41-05 BELL: (Was Mandatory Note 17 of AD-1H-2.) Applies to All Models in 47B Series, Through Serial Number 78. Compliance required at next 100-hour inspection. In order that the bearings will be securely locked in the gimbal ring, the fiber bearing seals should be replaced with steel bearing seals, P/N 27-120-127-1. This alteration is covered by Bell Service Bulletin 47C30 dated July 10, 1947. FOOTER:
Document Text
Show stored source text (verify against official source)
AD Final Rules - DRS_47-41-05.html Copy URL Print/Save as PDF Document Versions Feedback Details AD Number: 47-41-05 Document Type: AD Final Rules Docket Number: Unknown Subject Heading: Airworthiness Directives; Bell Model 47B Series Airplanes Subject: Gimbal Ring Bearing Seals Status: Current Citation: This information is not available. Citation Publish Date: Effective Date: Make: Scotts-Bell 47 Inc Model: 47B | 47B3 Product Type: Aircraft Product Subtype: Rotorcraft Affected AD: Superseded AD: Affected By: Superseded By: Service/Office: Office of Primary Responsibility: CFR Part Reference: Part 39 Comments: AIRWORTHINESS DIRECTIVES FINAL RULES: 47-41-05 CITATION: This information is not available. PAGE NUMBER: DOCKET NUMBER: Unknown AMENDMENT: AD NUMBER: 47-41-05 SUBJECT HEADING: Airworthiness Directives; Bell Model 47B Series Airplanes ACTION: SUMMARY: DATES: ADDRESSES: FOR FURTHER INFORMATION CONTACT: SUPPLEMENTARY INFORMATION: REGULATORY TEXT: 47-41-05 BELL: (Was Mandatory Note 17 of AD-1H-2.) Applies to All Models in 47B Series, Through Serial Number 78. Compliance required at next 100-hour inspection. In order that the bearings will be securely locked in the gimbal ring, the fiber bearing seals should be replaced with steel bearing seals, P/N 27-120-127-1. This alteration is covered by Bell Service Bulletin 47C30 dated July 10, 1947. 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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