AD 48-19-01
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| aircraft | Scotts-Bell 47 Inc | 47B | Airworthiness Directives; Bell Model 47B, 47B3, and 47D Helicopters |
| aircraft | Scotts-Bell 47 Inc | 47B3 | Airworthiness Directives; Bell Model 47B, 47B3, and 47D Helicopters |
| aircraft | Scotts-Bell 47 Inc | 47D | Airworthiness Directives; Bell Model 47B, 47B3, and 47D Helicopters |
Unsafe Condition
Failure of the stabilizer bar damper replenishing valves due to insufficient oil submersion could result in loss of stabilizer bar damping function.
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Required Actions
Replace existing damper support frames (47-140-132-1) with redesigned frames (47-140-013) to ensure continuous oil submersion of the stabilizer bar damper replenishing valves.
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Compliance Time
June 15, 1948
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Affected Aircraft
Scotts-Bell 47 Inc Model 47B, 47B3, and 47D helicopters, all serial numbers.
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Federal Register Abstract
Damper Support Frames
Applicability Source Text
Show captured applicability text from the source AD
AD Final Rules - DRS_48-19-01.html Copy URL Print/Save as PDF Document Versions Feedback Details AD Number: 48-19-01 Document Type: AD Final Rules Docket Number: Unknown Subject Heading: Airworthiness Directives; Bell Model 47B, 47B3, and 47D Helicopters Subject: Damper Support Frames Status: Current Citation: This information is not available. Citation Publish Date: Effective Date: Make: Scotts-Bell 47 Inc Model: 47B | 47B3 | 47D Product Type: Aircraft Product Subtype: Rotorcraft Affected AD: Superseded AD: Affected By: Superseded By: Service/Office: Office of Primary Responsibility: CFR Part Reference: Part 39 Comments: AIRWORTHINESS DIRECTIVES FINAL RULES: 48-19-01 CITATION: This information is not available. PAGE NUMBER: DOCKET NUMBER: Unknown AMENDMENT: AD NUMBER: 48-19-01 SUBJECT HEADING: Airworthiness Directives; Bell Model 47B, 47B3, and 47D Helicopters ACTION: SUMMARY: DATES: ADDRESSES: FOR FURTHER INFORMATION CONTACT: SUPPLEMENTARY INFORMATION: REGULATORY TEXT: 48-19-01 BELL: Applies to All Models 47B, 47B3, and 47D Helicopters. Compliance required by June 15, 1948. To provide continuous oil submersion of stabilizer bar damper replenishing valves, the dampers should be rotated 30 degrees down from their present position. This is accomplished by replacing the existing damper support frames, 47-140-132-1, with redesigned frames, 47-140- 013. (Bell Service Bulletin 64 covers this subject.) FOOTER:
Document Text
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AD Final Rules - DRS_48-19-01.html Copy URL Print/Save as PDF Document Versions Feedback Details AD Number: 48-19-01 Document Type: AD Final Rules Docket Number: Unknown Subject Heading: Airworthiness Directives; Bell Model 47B, 47B3, and 47D Helicopters Subject: Damper Support Frames Status: Current Citation: This information is not available. Citation Publish Date: Effective Date: Make: Scotts-Bell 47 Inc Model: 47B | 47B3 | 47D 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: 48-19-01 CITATION: This information is not available. PAGE NUMBER: DOCKET NUMBER: Unknown AMENDMENT: AD NUMBER: 48-19-01 SUBJECT HEADING: Airworthiness Directives; Bell Model 47B, 47B3, and 47D Helicopters ACTION: SUMMARY: DATES: ADDRESSES: FOR FURTHER INFORMATION CONTACT: SUPPLEMENTARY INFORMATION: REGULATORY TEXT: 48-19-01 BELL: Applies to All Models 47B, 47B3, and 47D Helicopters. Compliance required by June 15, 1948. To provide continuous oil submersion of stabilizer bar damper replenishing valves, the dampers should be rotated 30 degrees down from their present position. This is accomplished by replacing the existing damper support frames, 47-140-132-1, with redesigned frames, 47-140- 013. (Bell Service Bulletin 64 covers this 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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