AD 74-08-12
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| aircraft | Bell Helicopter Textron Canada Limited | 206A | Airworthiness Directives; Bell Model 206A and 206B Helicopters |
| aircraft | Bell Helicopter Textron Canada Limited | 206A-1 (OH-58A) | Airworthiness Directives; Bell Model 206A and 206B Helicopters |
| aircraft | Bell Helicopter Textron Canada Limited | 206B | Airworthiness Directives; Bell Model 206A and 206B Helicopters |
| aircraft | Bell Helicopter Textron Canada Limited | 206B-1 | Airworthiness Directives; Bell Model 206A and 206B Helicopters |
Unsafe Condition
Loose rivets in the tail boom skin splice from Station 300 to Station 341 on the left-hand side of the boom and cracked tail boom skin in the same area.
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Required Actions
Inspect visually the rivets for looseness or working in the skin splice and inspect the tail boom skin for cracks using a three power or higher magnifying glass. Replace loose rivets with AN470AD5-2 or CR2249-5-2 or equivalent rivets before further flight. Replace cracked tail booms before further flight with a serviceable tail boom in accordance with Section VIII of the Model 206A/B Maintenance and Overhaul Instructions or repair cracked tail booms in accordance with FAA or FAA DER approved repair data.
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Compliance Time
within 50 hours time in service after the effective date of this A.D., unless already accomplished within the last 50 hours time in service, and thereafter at intervals not to exceed 100 hours time in service from the last inspection
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Affected Aircraft
Bell Helicopter Textron Canada Limited Model 206A, 206A-1 (OH-58A), 206B, 206B-1 helicopters, serial numbers 1 through 944
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Federal Register Abstract
Tail Boom Skin Splice
Applicability Source Text
Show captured applicability text from the source AD
AD Final Rules - DRS_74-08-12.html Copy URL Print/Save as PDF Document Versions Feedback Details AD Number: 74-08-12 Document Type: AD Final Rules Docket Number: Unknown Subject Heading: Airworthiness Directives; Bell Model 206A and 206B Helicopters Subject: Tail Boom Skin Splice Status: Current Citation: This information is not available. Citation Publish Date: Effective Date: 05/14/1974 Make: Bell Helicopter Textron Canada Limited Model: 206A | 206A-1 (OH-58A) | 206B | 206B-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: 74-08-12 CITATION: This information is not available. PAGE NUMBER: DOCKET NUMBER: Unknown AMENDMENT: 39-1815 AD NUMBER: 74-08-12 SUBJECT HEADING: Airworthiness Directives; Bell Model 206A and 206B Helicopters ACTION: SUMMARY: DATES: Effective May 14, 1974. ADDRESSES: FOR FURTHER INFORMATION CONTACT: SUPPLEMENTARY INFORMATION: REGULATORY TEXT: 74-08-12 BELL: Amendment 39-1815. Applies to Model 206A and 206B helicopters, serial numbers 1 through 944, certificated in all categories. Compliance required within 50 hours time in service after the effective date of this A.D., unless already accomplished within the last 50 hours time in service, and thereafter at intervals not to exceed 100 hours time in service from the last inspection. To detect loose rivets in the tail boom skin splice from Station 300 to Station 341 on the left-hand side of the boom and cracked tail boom skin in the same area, accomplish the following: (a) Inspect visually the rivets for looseness or working in the skin splice and inspect the tail boom skin for cracks using a three power or higher magnifying glass. (b) Replace loose rivets with AN470AD5-2 or CR2249-5-2 or equivalent rivets before further flight. (c) Replace cracked tail booms before further flight with a serviceable tail boom in accordance with Section VIII of the Model 206A/B Maintenance and Overhaul Instructions or repair cracked tail booms in accordance with FAA or FAA DER approved repair data. (d) The repetitive inspections are still applicable for the noted helicopters after replacement of loose rivets or repair of cracked booms. (Bell Helicopter Co. Service Bulletin No. 206-01-73-4, Revision B, dated October 16, 1973 pertains to this subject.) This amendment becomes effective May 14, 1974. FOOTER:
Document Text
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AD Final Rules - DRS_74-08-12.html Copy URL Print/Save as PDF Document Versions Feedback Details AD Number: 74-08-12 Document Type: AD Final Rules Docket Number: Unknown Subject Heading: Airworthiness Directives; Bell Model 206A and 206B Helicopters Subject: Tail Boom Skin Splice Status: Current Citation: This information is not available. Citation Publish Date: Effective Date: 05/14/1974 Make: Bell Helicopter Textron Canada Limited Model: 206A | 206A-1 (OH-58A) | 206B | 206B-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: 74-08-12 CITATION: This information is not available. PAGE NUMBER: DOCKET NUMBER: Unknown AMENDMENT: 39-1815 AD NUMBER: 74-08-12 SUBJECT HEADING: Airworthiness Directives; Bell Model 206A and 206B Helicopters ACTION: SUMMARY: DATES: Effective May 14, 1974. ADDRESSES: FOR FURTHER INFORMATION CONTACT: SUPPLEMENTARY INFORMATION: REGULATORY TEXT: 74-08-12 BELL: Amendment 39-1815. Applies to Model 206A and 206B helicopters, serial numbers 1 through 944, certificated in all categories. Compliance required within 50 hours time in service after the effective date of this A.D., unless already accomplished within the last 50 hours time in service, and thereafter at intervals not to exceed 100 hours time in service from the last inspection. To detect loose rivets in the tail boom skin splice from Station 300 to Station 341 on the left-hand side of the boom and cracked tail boom skin in the same area, accomplish the following: (a) Inspect visually the rivets for looseness or working in the skin splice and inspect the tail boom skin for cracks using a three power or higher magnifying glass. (b) Replace loose rivets with AN470AD5-2 or CR2249-5-2 or equivalent rivets before further flight. (c) Replace cracked tail booms before further flight with a serviceable tail boom in accordance with Section VIII of the Model 206A/B Maintenance and Overhaul Instructions or repair cracked tail booms in accordance with FAA or FAA DER approved repair data. (d) The repetitive inspections are still applicable for the noted helicopters after replacement of loose rivets or repair of cracked booms. (Bell Helicopter Co. Service Bulletin No. 206-01-73-4, Revision B, dated October 16, 1973 pertains to this subject.) This amendment becomes effective May 14, 1974. FOOTER:
Source: Official FAA Source ↗
Retrieved: Apr 8, 2026
Rights: U.S. Government Public Domain
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