AD 73-19-02
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| aircraft | Scotts-Bell 47 Inc | 47B | Airworthiness Directives; Bell Model 47B, 47B-3, 47D, 47D-1, 47E, 47G, 47G-2 and 47H-1 Helicopters |
| aircraft | Scotts-Bell 47 Inc | 47B3 | Airworthiness Directives; Bell Model 47B, 47B-3, 47D, 47D-1, 47E, 47G, 47G-2 and 47H-1 Helicopters |
| aircraft | Scotts-Bell 47 Inc | 47D | Airworthiness Directives; Bell Model 47B, 47B-3, 47D, 47D-1, 47E, 47G, 47G-2 and 47H-1 Helicopters |
| aircraft | Scotts-Bell 47 Inc | 47D1 | Airworthiness Directives; Bell Model 47B, 47B-3, 47D, 47D-1, 47E, 47G, 47G-2 and 47H-1 Helicopters |
| aircraft | Scotts-Bell 47 Inc | 47E | Airworthiness Directives; Bell Model 47B, 47B-3, 47D, 47D-1, 47E, 47G, 47G-2 and 47H-1 Helicopters |
| aircraft | Scotts-Bell 47 Inc | 47G | Airworthiness Directives; Bell Model 47B, 47B-3, 47D, 47D-1, 47E, 47G, 47G-2 and 47H-1 Helicopters |
| aircraft | Scotts-Bell 47 Inc | 47G-2 | Airworthiness Directives; Bell Model 47B, 47B-3, 47D, 47D-1, 47E, 47G, 47G-2 and 47H-1 Helicopters |
| aircraft | Scotts-Bell 47 Inc | 47H-1 | Airworthiness Directives; Bell Model 47B, 47B-3, 47D, 47D-1, 47E, 47G, 47G-2 and 47H-1 Helicopters |
Unsafe Condition
Fatigue failure of the tail rotor yoke, P/N 47-641-057-9, with serial numbers N29-1246 through N29-1266, N29-1298 through N29-1452, N29-10453 through N29-10488, and N29-10501 through N29-10525.
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Required Actions
Replace tail rotor yokes with 390 or more hours total time in service on the effective date within 10 hours time in service. Replace those with less than 390 hours prior to accumulating 400 hours total time in service.
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Compliance Time
within 10 hours time in service
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Federal Register Abstract
Tail Rotor Yoke
Applicability Source Text
Show captured applicability text from the source AD
AD Final Rules - DRS_73-19-02.html Copy URL Print/Save as PDF Document Versions Feedback Details AD Number: 73-19-02 Document Type: AD Final Rules Docket Number: Unknown Subject Heading: Airworthiness Directives; Bell Model 47B, 47B-3, 47D, 47D-1, 47E, 47G, 47G-2 and 47H-1 Helicopters Subject: Tail Rotor Yoke Status: Current Citation: This information is not available. Citation Publish Date: Effective Date: Make: Scotts-Bell 47 Inc Model: 47B | 47B3 | 47D | 47D1 | 47E | 47G | 47G-2 | 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: 73-19-02 CITATION: This information is not available. PAGE NUMBER: DOCKET NUMBER: Unknown AMENDMENT: 39-1717 AD NUMBER: 73-19-02 SUBJECT HEADING: Airworthiness Directives; Bell Model 47B, 47B-3, 47D, 47D-1, 47E, 47G, 47G-2 and 47H-1 Helicopters ACTION: SUMMARY: DATES: ADDRESSES: FOR FURTHER INFORMATION CONTACT: SUPPLEMENTARY INFORMATION: REGULATORY TEXT: 73-19-02 BELL: Amdt. 39-1717. Applies to Bell Models 47B, 47B-3, 47D, 47D-1, 47E, 47G, 47G-2 and 47H-1 helicopters certificated in all categories. Compliance required as indicated. To prevent possible fatigue failure of the tail rotor yoke, P/N 47-641-057-9, remove and replace tail rotor yokes having S/N N29-1246 through N29-1266, N29-1298 through N29-1452, N29-10453 through N29-10488, and N29-10501 through N29-10525, as specified below. (a) Replace those yokes with 390 or more hours total time in service on the effective date of this AD, within 10 hours time in service. (b) Replace those yokes with less than 390 hours total time in service on the effective date of this AD, prior to accumulating 400 hours total time in service. The requirements of this AD do not affect other Model 47 series helicopter tail rotor yokes. (Bell Helicopter Co. Service Bulletin No. 47-05-73-1 dated August 22, 1973 pertains to this subject.) This amendment becomes effective to owners and operators on receipt of the mailed amendment and becomes effective to all other persons on September 14, 1973. FOOTER:
Document Text
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AD Final Rules - DRS_73-19-02.html Copy URL Print/Save as PDF Document Versions Feedback Details AD Number: 73-19-02 Document Type: AD Final Rules Docket Number: Unknown Subject Heading: Airworthiness Directives; Bell Model 47B, 47B-3, 47D, 47D-1, 47E, 47G, 47G-2 and 47H-1 Helicopters Subject: Tail Rotor Yoke Status: Current Citation: This information is not available. Citation Publish Date: Effective Date: Make: Scotts-Bell 47 Inc Model: 47B | 47B3 | 47D | 47D1 | 47E | 47G | 47G-2 | 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: 73-19-02 CITATION: This information is not available. PAGE NUMBER: DOCKET NUMBER: Unknown AMENDMENT: 39-1717 AD NUMBER: 73-19-02 SUBJECT HEADING: Airworthiness Directives; Bell Model 47B, 47B-3, 47D, 47D-1, 47E, 47G, 47G-2 and 47H-1 Helicopters ACTION: SUMMARY: DATES: ADDRESSES: FOR FURTHER INFORMATION CONTACT: SUPPLEMENTARY INFORMATION: REGULATORY TEXT: 73-19-02 BELL: Amdt. 39-1717. Applies to Bell Models 47B, 47B-3, 47D, 47D-1, 47E, 47G, 47G-2 and 47H-1 helicopters certificated in all categories. Compliance required as indicated. To prevent possible fatigue failure of the tail rotor yoke, P/N 47-641-057-9, remove and replace tail rotor yokes having S/N N29-1246 through N29-1266, N29-1298 through N29-1452, N29-10453 through N29-10488, and N29-10501 through N29-10525, as specified below. (a) Replace those yokes with 390 or more hours total time in service on the effective date of this AD, within 10 hours time in service. (b) Replace those yokes with less than 390 hours total time in service on the effective date of this AD, prior to accumulating 400 hours total time in service. The requirements of this AD do not affect other Model 47 series helicopter tail rotor yokes. (Bell Helicopter Co. Service Bulletin No. 47-05-73-1 dated August 22, 1973 pertains to this subject.) This amendment becomes effective to owners and operators on receipt of the mailed amendment and becomes effective to all other persons on September 14, 1973. FOOTER:
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Retrieved: Apr 8, 2026
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Unsafe Condition: Inspect Tail Rotor Blade & Abrasion Strip