AD 47-32-07
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| aircraft | Scotts-Bell 47 Inc | 47B | Airworthiness Directives; Bell Model 47B Helicopters |
Unsafe Condition
Chafing of the intake manifold balance pipe against the oil tank.
AI-generated summary from the source AD text. Verify against the official source before acting.
Required Actions
Install an extra piece of hose (Aircooled P/N 11868) on the pipe at the side of the tank near the oil filter mount, approximately 1 3/8 inches from the manifold pipe connection.
AI-generated summary from the source AD text. Verify against the official source before acting.
Compliance Time
next 25-hour inspection after September 15, 1947
AI-generated summary from the source AD text. Verify against the official source before acting.
Affected Aircraft
Bell Model 47B helicopters with Aircooled 6V4-178-B3, -B32, O-335-1, or O-335-3 engines.
AI-generated summary from the source AD text. Verify against the official source before acting.
Federal Register Abstract
Manifold Pipe Chafing
Applicability Source Text
Show captured applicability text from the source AD
AD Final Rules - DRS_47-32-07.html Copy URL Print/Save as PDF Document Versions Feedback Details AD Number: 47-32-07 Document Type: AD Final Rules Docket Number: Unknown Subject Heading: Airworthiness Directives; Bell Model 47B Helicopters Subject: Manifold Pipe Chafing Status: Current Citation: This information is not available. Citation Publish Date: Effective Date: Make: Scotts-Bell 47 Inc Model: 47B Product Type: Aircraft Product Subtype: Rotorcraft Affected AD: Superseded AD: Affected By: Superseded By: Service/Office: Office of Primary Responsibility: CFR Part Reference: Part 39 Comments: Updated RGL applicability to match AD applicability; CAR C-11-185 AIRWORTHINESS DIRECTIVES FINAL RULES: 47-32-07 CITATION: This information is not available. PAGE NUMBER: DOCKET NUMBER: Unknown AMENDMENT: AD NUMBER: 47-32-07 SUBJECT HEADING: Airworthiness Directives; Bell Model 47B Helicopters ACTION: SUMMARY: DATES: ADDRESSES: FOR FURTHER INFORMATION CONTACT: SUPPLEMENTARY INFORMATION: REGULATORY TEXT: 47-32-07 BELL: (Was Mandatory Note 7 of AD-1H-1.) Applies to All Model 47B With Aircooled 6V4-178-B3, -B32, O-335-1, or O-335-3 Engines. Compliance required not later than next 25-hour inspection after September 15, 1947. To eliminate chafing of intake manifold balance pipe against the oil tank an extra piece of hose, Aircooled P/N 11868, should be installed on the pipe at the side of the tank where the oil filter is mounted and approximately 1 3/8 inches from the hose which connects the two manifold pipes. (Franklin Service Bulletin No. 55 dated May 28, 1947, pertains to this same subject.) FOOTER:
Document Text
Show stored source text (verify against official source)
AD Final Rules - DRS_47-32-07.html Copy URL Print/Save as PDF Document Versions Feedback Details AD Number: 47-32-07 Document Type: AD Final Rules Docket Number: Unknown Subject Heading: Airworthiness Directives; Bell Model 47B Helicopters Subject: Manifold Pipe Chafing Status: Current Citation: This information is not available. Citation Publish Date: Effective Date: Make: Scotts-Bell 47 Inc Model: 47B 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: Updated RGL applicability to match AD applicability; CAR C-11-185 AIRWORTHINESS DIRECTIVES FINAL RULES: 47-32-07 CITATION: This information is not available. PAGE NUMBER: DOCKET NUMBER: Unknown AMENDMENT: AD NUMBER: 47-32-07 SUBJECT HEADING: Airworthiness Directives; Bell Model 47B Helicopters ACTION: SUMMARY: DATES: ADDRESSES: FOR FURTHER INFORMATION CONTACT: SUPPLEMENTARY INFORMATION: REGULATORY TEXT: 47-32-07 BELL: (Was Mandatory Note 7 of AD-1H-1.) Applies to All Model 47B With Aircooled 6V4-178-B3, -B32, O-335-1, or O-335-3 Engines. Compliance required not later than next 25-hour inspection after September 15, 1947. To eliminate chafing of intake manifold balance pipe against the oil tank an extra piece of hose, Aircooled P/N 11868, should be installed on the pipe at the side of the tank where the oil filter is mounted and approximately 1 3/8 inches from the hose which connects the two manifold pipes. (Franklin Service Bulletin No. 55 dated May 28, 1947, pertains to this same subject.) FOOTER:
Source: Official FAA Source ↗
Retrieved: Apr 8, 2026
Rights: U.S. Government Public Domain
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