AD 75-17-20
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| aircraft | Airbus Helicopters | SA341G | Airworthiness Directives; Societe Nationale Industrielle Aerospatiale Model SA-341G "Gazelle" Helicopters |
Unsafe Condition
Excessive elongation of main rotor blade torsion strip stacks in service could lead to loss of helicopter control.
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Required Actions
Install three 'tell-tale' devices on the main rotor hub per SA-341 Service Bulletin No. 65.10 or equivalent. Visually check the 'tell-tale' device's frangible screw before first flight daily; if broken, rectify installation and replace associated torsion strip stack as per the same service bulletin.
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Compliance Time
within the next 100 hours' time in service
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Affected Aircraft
Societe Nationale Industrielle Aerospatiale Model SA-341G 'Gazelle' helicopters, serial numbers 1299 and lower
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Federal Register Abstract
Main Rotor Blade
Applicability Source Text
Show captured applicability text from the source AD
AD Final Rules - DRS_75-17-20.html Copy URL Print/Save as PDF Document Versions Feedback Details AD Number: 75-17-20 Document Type: AD Final Rules Docket Number: Unknown Subject Heading: Airworthiness Directives; Societe Nationale Industrielle Aerospatiale Model SA-341G "Gazelle" Helicopters Subject: Main Rotor Blade Status: Current Citation: This information is not available. Citation Publish Date: Effective Date: 08/19/1975 Make: Airbus Helicopters Model: SA341G Product Type: Aircraft Product Subtype: Rotorcraft Affected AD: Superseded AD: Affected By: Superseded By: Service/Office: Office of Primary Responsibility: CFR Part Reference: Part 39 Comments: AIRWORTHINESS DIRECTIVES FINAL RULES: 75-17-20 CITATION: This information is not available. PAGE NUMBER: DOCKET NUMBER: Unknown AMENDMENT: 39-2322 AD NUMBER: 75-17-20 SUBJECT HEADING: Airworthiness Directives; Societe Nationale Industrielle Aerospatiale Model SA-341G "Gazelle" Helicopters ACTION: SUMMARY: DATES: Effective August 19, 1975. ADDRESSES: FOR FURTHER INFORMATION CONTACT: SUPPLEMENTARY INFORMATION: REGULATORY TEXT: 75-17-20 SOCIETE NATIONALE INDUSTRIELLE AEROSPATIALE: Amendment 39- 2322. Applies to Model SA-341G "Gazelle" helicopters, serial numbers 1299 and lower, certificated in all categories. Compliance is required within the next 100 hours' time in service, unless already accomplished in accordance with SA-341 Service Bulletin No. 65.10. To detect excessive elongation of main rotor blade torsion strip stacks in service, and prevent consequent loss of helicopter control, accomplish the following: (a) Install three "tell-tale" devices on the main rotor hub in accordance with subparagraph 1C (1) of SA-341 Service Bulletin No. 65.10 dated February 27, 1975, or an equivalent approved by the Chief, Aircraft Certification Staff, FAA, Europe, Africa, and Middle East Region. (b) Prior to first flight of the day, visually check "tell-tale" device for condition of the frangible screw. If the frangible screw is found broken, rectify "tell-tale" installation and replace associated torsion strip stack in accordance with subparagraph 1C (2) of SA-341 Service Bulletin No. 65.10, dated February 27, 1975, or an equivalent approved by the Chief, Aircraft Certification Staff, FAA, Europe, Africa, and Middle East Region. The check required by this AD may be performed by the pilot. This amendment becomes effective August 19, 1975. FOOTER:
Document Text
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AD Final Rules - DRS_75-17-20.html Copy URL Print/Save as PDF Document Versions Feedback Details AD Number: 75-17-20 Document Type: AD Final Rules Docket Number: Unknown Subject Heading: Airworthiness Directives; Societe Nationale Industrielle Aerospatiale Model SA-341G "Gazelle" Helicopters Subject: Main Rotor Blade Status: Current Citation: This information is not available. Citation Publish Date: Effective Date: 08/19/1975 Make: Airbus Helicopters Model: SA341G 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: 75-17-20 CITATION: This information is not available. PAGE NUMBER: DOCKET NUMBER: Unknown AMENDMENT: 39-2322 AD NUMBER: 75-17-20 SUBJECT HEADING: Airworthiness Directives; Societe Nationale Industrielle Aerospatiale Model SA-341G "Gazelle" Helicopters ACTION: SUMMARY: DATES: Effective August 19, 1975. ADDRESSES: FOR FURTHER INFORMATION CONTACT: SUPPLEMENTARY INFORMATION: REGULATORY TEXT: 75-17-20 SOCIETE NATIONALE INDUSTRIELLE AEROSPATIALE: Amendment 39- 2322. Applies to Model SA-341G "Gazelle" helicopters, serial numbers 1299 and lower, certificated in all categories. Compliance is required within the next 100 hours' time in service, unless already accomplished in accordance with SA-341 Service Bulletin No. 65.10. To detect excessive elongation of main rotor blade torsion strip stacks in service, and prevent consequent loss of helicopter control, accomplish the following: (a) Install three "tell-tale" devices on the main rotor hub in accordance with subparagraph 1C (1) of SA-341 Service Bulletin No. 65.10 dated February 27, 1975, or an equivalent approved by the Chief, Aircraft Certification Staff, FAA, Europe, Africa, and Middle East Region. (b) Prior to first flight of the day, visually check "tell-tale" device for condition of the frangible screw. If the frangible screw is found broken, rectify "tell-tale" installation and replace associated torsion strip stack in accordance with subparagraph 1C (2) of SA-341 Service Bulletin No. 65.10, dated February 27, 1975, or an equivalent approved by the Chief, Aircraft Certification Staff, FAA, Europe, Africa, and Middle East Region. The check required by this AD may be performed by the pilot. This amendment becomes effective August 19, 1975. FOOTER:
Source: Official FAA Source ↗
Retrieved: Apr 8, 2026
Rights: U.S. Government Public Domain
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