AD 56-15-01
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| aircraft | Scotts-Bell 47 Inc | 47H-1 | Airworthiness Directives; Bell Model 47H1 Helicopters |
Unsafe Condition
Tail boom skin cracking in the area of the aft ballast and inadequate clearance with the new aft ballast provision installation.
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Required Actions
Install Bell Kit No. 47-2406-1B for revised aft ballast provision and Bell Kit No. 47-2406-1A for Antitorque Control Pulley Brackets. Also install new tail rotor control cable assembly P/N NAS 302 R-66-5537.
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Compliance Time
as soon as possible, but not later than August 15, 1956
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Affected Aircraft
Scotts-Bell 47 Inc Model 47H-1 Helicopters, Serial Numbers 1347 Through 1356
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Federal Register Abstract
Antitorque Control System
Applicability Source Text
Show captured applicability text from the source AD
AD Final Rules - DRS_56-15-01.html Copy URL Print/Save as PDF Document Versions Feedback Details AD Number: 56-15-01 Document Type: AD Final Rules Docket Number: Unknown Subject Heading: Airworthiness Directives; Bell Model 47H1 Helicopters Subject: Antitorque Control System Status: Current Citation: This information is not available. Citation Publish Date: Effective Date: Make: Scotts-Bell 47 Inc Model: 47H-1 Product Type: Aircraft Product Subtype: Rotorcraft Affected AD: Superseded AD: Affected By: Superseded By: Service/Office: Office of Primary Responsibility: CFR Part Reference: Part 39 Comments: AIRWORTHINESS DIRECTIVES FINAL RULES: 56-15-01 CITATION: This information is not available. PAGE NUMBER: DOCKET NUMBER: Unknown AMENDMENT: AD NUMBER: 56-15-01 SUBJECT HEADING: Airworthiness Directives; Bell Model 47H1 Helicopters ACTION: SUMMARY: DATES: ADDRESSES: FOR FURTHER INFORMATION CONTACT: SUPPLEMENTARY INFORMATION: REGULATORY TEXT: 56-15-01 BELL: Applies to Model 47H1 Helicopters, Serial Numbers 1347 Through 1356. Compliance required as soon as possible, but not later than August 15, 1956. In order to prevent tail boom skin cracking in the area of the aft ballast, it is necessary to complete a revised aft ballast provision installation utilizing Bell Kit No. 47-2406-1B. In addition it is also necessary to install Bell Kit No. 47-2406-1A, Antitorque Control Pulley Brackets Installation, at this same time to permit the installation of the new tail rotor control cable assembly, P/N NAS 302 R-66-5537. This revised antitorque control system installation is required to provide adequate clearance with the new aft ballast provision installation. (Bell Mandatory Service Bulletin No. 110 dated June 1, 1956 covers this same subject.) FOOTER:
Document Text
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AD Final Rules - DRS_56-15-01.html Copy URL Print/Save as PDF Document Versions Feedback Details AD Number: 56-15-01 Document Type: AD Final Rules Docket Number: Unknown Subject Heading: Airworthiness Directives; Bell Model 47H1 Helicopters Subject: Antitorque Control System Status: Current Citation: This information is not available. Citation Publish Date: Effective Date: Make: Scotts-Bell 47 Inc Model: 47H-1 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: 56-15-01 CITATION: This information is not available. PAGE NUMBER: DOCKET NUMBER: Unknown AMENDMENT: AD NUMBER: 56-15-01 SUBJECT HEADING: Airworthiness Directives; Bell Model 47H1 Helicopters ACTION: SUMMARY: DATES: ADDRESSES: FOR FURTHER INFORMATION CONTACT: SUPPLEMENTARY INFORMATION: REGULATORY TEXT: 56-15-01 BELL: Applies to Model 47H1 Helicopters, Serial Numbers 1347 Through 1356. Compliance required as soon as possible, but not later than August 15, 1956. In order to prevent tail boom skin cracking in the area of the aft ballast, it is necessary to complete a revised aft ballast provision installation utilizing Bell Kit No. 47-2406-1B. In addition it is also necessary to install Bell Kit No. 47-2406-1A, Antitorque Control Pulley Brackets Installation, at this same time to permit the installation of the new tail rotor control cable assembly, P/N NAS 302 R-66-5537. This revised antitorque control system installation is required to provide adequate clearance with the new aft ballast provision installation. (Bell Mandatory Service Bulletin No. 110 dated June 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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Related Airworthiness Directives
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