AD 56-15-02
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| aircraft | Scotts-Bell 47 Inc | 47 | Airworthiness Directives; Bell Model 47 Series Helicopters |
| aircraft | Scotts-Bell 47 Inc | 47B | Airworthiness Directives; Bell Model 47 Series Helicopters |
| aircraft | Scotts-Bell 47 Inc | 47B3 | Airworthiness Directives; Bell Model 47 Series Helicopters |
| aircraft | Scotts-Bell 47 Inc | 47D | Airworthiness Directives; Bell Model 47 Series Helicopters |
| aircraft | Scotts-Bell 47 Inc | 47D1 | Airworthiness Directives; Bell Model 47 Series Helicopters |
| aircraft | Scotts-Bell 47 Inc | 47E | Airworthiness Directives; Bell Model 47 Series Helicopters |
| aircraft | Scotts-Bell 47 Inc | 47G | Airworthiness Directives; Bell Model 47 Series Helicopters |
| aircraft | Scotts-Bell 47 Inc | 47G-2 | Airworthiness Directives; Bell Model 47 Series Helicopters |
| aircraft | Scotts-Bell 47 Inc | 47G-2A | Airworthiness Directives; Bell Model 47 Series Helicopters |
| aircraft | Scotts-Bell 47 Inc | 47G-2A-1 | Airworthiness Directives; Bell Model 47 Series Helicopters |
| aircraft | Scotts-Bell 47 Inc | 47G-3 | Airworthiness Directives; Bell Model 47 Series Helicopters |
| aircraft | Scotts-Bell 47 Inc | 47G-3B | Airworthiness Directives; Bell Model 47 Series Helicopters |
| aircraft | Scotts-Bell 47 Inc | 47G-3B-1 | Airworthiness Directives; Bell Model 47 Series Helicopters |
| aircraft | Scotts-Bell 47 Inc | 47G-3B-2 | Airworthiness Directives; Bell Model 47 Series Helicopters |
| aircraft | Scotts-Bell 47 Inc | 47G-3B-2A | Airworthiness Directives; Bell Model 47 Series Helicopters |
| aircraft | Scotts-Bell 47 Inc | 47G-4 | Airworthiness Directives; Bell Model 47 Series Helicopters |
| aircraft | Scotts-Bell 47 Inc | 47G-4A | Airworthiness Directives; Bell Model 47 Series Helicopters |
| aircraft | Scotts-Bell 47 Inc | 47G-5 | Airworthiness Directives; Bell Model 47 Series Helicopters |
| aircraft | Scotts-Bell 47 Inc | 47G-5A | Airworthiness Directives; Bell Model 47 Series Helicopters |
| aircraft | Scotts-Bell 47 Inc | 47H-1 | Airworthiness Directives; Bell Model 47 Series Helicopters |
| aircraft | Scotts-Bell 47 Inc | 47J | Airworthiness Directives; Bell Model 47 Series Helicopters |
| aircraft | Scotts-Bell 47 Inc | 47J-2 | Airworthiness Directives; Bell Model 47 Series Helicopters |
| aircraft | Scotts-Bell 47 Inc | 47J-2A | Airworthiness Directives; Bell Model 47 Series Helicopters |
| aircraft | Scotts-Bell 47 Inc | 47K | Airworthiness Directives; Bell Model 47 Series Helicopters |
Unsafe Condition
Cracking of the control ring horns in the area of the control horn ears has been found.
AI-generated summary from the source AD text. Verify against the official source before acting.
Required Actions
Disconnect control rods from the swashplate control ring horns and inspect the area around the control horn ears with a 10-power magnifying glass for cracks. If cracks exist, remove and replace the swashplate immediately. If no cracks are found, remove sharp edges and file a 0.062 inch radius in each corner of the fore and aft control horn between the ears before replacing.
AI-generated summary from the source AD text. Verify against the official source before acting.
Compliance Time
as soon as possible but not later than August 15, 1956
AI-generated summary from the source AD text. Verify against the official source before acting.
Affected Aircraft
Bell Model 47 Series Helicopters with 47-150-184-1 or 47-150-184-3 Swashplate Control Ring installed, excluding specific serial numbers for Models 47G, 47G2, and 47H1 as listed in the AD.
AI-generated summary from the source AD text. Verify against the official source before acting.
Federal Register Abstract
Swashplate Control Ring
Applicability Source Text
Show captured applicability text from the source AD
AD Final Rules - DRS_56-15-02.html Copy URL Print/Save as PDF Document Versions Feedback Details AD Number: 56-15-02 Document Type: AD Final Rules Docket Number: Unknown Subject Heading: Airworthiness Directives; Bell Model 47 Series Helicopters Subject: Swashplate Control Ring Status: Current Citation: This information is not available. Citation Publish Date: Effective Date: Make: Scotts-Bell 47 Inc Model: 47 | 47B | 47B3 | 47D | 47D1 | 47E | 47G | 47G-2 | 47G-2A | 47G-2A-1 | 47G-3 | 47G-3B | 47G-3B-1 | 4...Show more 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: 56-15-02 CITATION: This information is not available. PAGE NUMBER: DOCKET NUMBER: Unknown AMENDMENT: AD NUMBER: 56-15-02 SUBJECT HEADING: Airworthiness Directives; Bell Model 47 Series Helicopters ACTION: SUMMARY: DATES: ADDRESSES: FOR FURTHER INFORMATION CONTACT: SUPPLEMENTARY INFORMATION: REGULATORY TEXT: 56-15-02 BELL: Applies to All Model 47 Series Helicopters Having the 47-150-184-1 or 47-150-184-3 Swashplate Control Ring Installed, Except the Following: Model 47G, Serial Numbers 1378, 1524, 1529 Through 1533 and 1687 and Subsequent. Model 47G2, Serial Numbers 1467, 1469 Through 1471, 1478, 1479, 1481, 1483, 1484, 1487 Through 1499 and 1500 and Subsequent. Model 47H1, Serial Numbers 1347, 1348, 1361, 1366 and Subsequent. Compliance required as indicated. Cracking of the control ring horns in the area of the control horn ears has been found. It is necessary that the following action for the 47-150-184-1 and 47-150-184-3 swashplate control ring, lateral, fore and aft control horns be taken as soon as possible but not later than August 15, 1956: Disconnect the control rods from the swashplate control ring horns and using a 10-power magnifying glass inspect the area around the control horn ears for evidence of cracks. If cracks are found, remove the swashplate and replace immediately. If no cracks are found, remove the sharp edge from the top of the fore and aft control horn between the ears and file a 0.062 inch radius in each corner of the fore and after control horn between the ears before replacing. (Bell Mandatory Service Bulletin No. 108, dated May 1, 1956 covers this same subject.) FOOTER:
Document Text
Show stored source text (verify against official source)
AD Final Rules - DRS_56-15-02.html Copy URL Print/Save as PDF Document Versions Feedback Details AD Number: 56-15-02 Document Type: AD Final Rules Docket Number: Unknown Subject Heading: Airworthiness Directives; Bell Model 47 Series Helicopters Subject: Swashplate Control Ring Status: Current Citation: This information is not available. Citation Publish Date: Effective Date: Make: Scotts-Bell 47 Inc Model: 47 | 47B | 47B3 | 47D | 47D1 | 47E | 47G | 47G-2 | 47G-2A | 47G-2A-1 | 47G-3 | 47G-3B | 47G-3B-1 | 4...Show more 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: 56-15-02 CITATION: This information is not available. PAGE NUMBER: DOCKET NUMBER: Unknown AMENDMENT: AD NUMBER: 56-15-02 SUBJECT HEADING: Airworthiness Directives; Bell Model 47 Series Helicopters ACTION: SUMMARY: DATES: ADDRESSES: FOR FURTHER INFORMATION CONTACT: SUPPLEMENTARY INFORMATION: REGULATORY TEXT: 56-15-02 BELL: Applies to All Model 47 Series Helicopters Having the 47-150-184-1 or 47-150-184-3 Swashplate Control Ring Installed, Except the Following: Model 47G, Serial Numbers 1378, 1524, 1529 Through 1533 and 1687 and Subsequent. Model 47G2, Serial Numbers 1467, 1469 Through 1471, 1478, 1479, 1481, 1483, 1484, 1487 Through 1499 and 1500 and Subsequent. Model 47H1, Serial Numbers 1347, 1348, 1361, 1366 and Subsequent. Compliance required as indicated. Cracking of the control ring horns in the area of the control horn ears has been found. It is necessary that the following action for the 47-150-184-1 and 47-150-184-3 swashplate control ring, lateral, fore and aft control horns be taken as soon as possible but not later than August 15, 1956: Disconnect the control rods from the swashplate control ring horns and using a 10-power magnifying glass inspect the area around the control horn ears for evidence of cracks. If cracks are found, remove the swashplate and replace immediately. If no cracks are found, remove the sharp edge from the top of the fore and aft control horn between the ears and file a 0.062 inch radius in each corner of the fore and after control horn between the ears before replacing. (Bell Mandatory Service Bulletin No. 108, dated May 1, 1956 covers this same subject.) FOOTER:
Source: Official FAA Source ↗
Retrieved: Apr 8, 2026
Rights: U.S. Government Public Domain
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