AD 70-14-06
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| aircraft | Bell Helicopter Textron Canada Limited | 206A | Airworthiness Directives; Bell Model 206A Helicopters |
Unsafe Condition
Failure of the existing firewall-to-compressor seal could result in engine compressor flange loads that may lead to seal failure and subsequent engine failure.
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Required Actions
Replace existing firewall-to-compressor seal with Bell Part No. 206-704-026-1 in accordance with Bell Service Letter 206A-142. Equivalent methods require FAA approval.
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Compliance Time
not later than 300 hours time in service after the effective date of this Airworthiness Directive
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Affected Aircraft
Bell Helicopter Textron Canada Limited Model 206A Helicopters with serial numbers 4 thru 448, 460 thru 464, 467, 469 thru 473, and 475 thru 477
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Federal Register Abstract
Fire Wall To Compressor Seal
Applicability Source Text
Show captured applicability text from the source AD
AD Final Rules - DRS_70-14-06.html Copy URL Print/Save as PDF Document Versions Feedback Details AD Number: 70-14-06 Document Type: AD Final Rules Docket Number: Unknown Subject Heading: Airworthiness Directives; Bell Model 206A Helicopters Subject: Fire Wall To Compressor Seal Status: Current Citation: This information is not available. Citation Publish Date: Effective Date: 08/16/1970 Make: Bell Helicopter Textron Canada Limited Model: 206A Product Type: Aircraft Product Subtype: Rotorcraft Affected AD: Superseded AD: Affected By: Superseded By: Service/Office: Office of Primary Responsibility: CFR Part Reference: Part 39 Comments: AIRWORTHINESS DIRECTIVES FINAL RULES: 70-14-06 CITATION: This information is not available. PAGE NUMBER: DOCKET NUMBER: Unknown AMENDMENT: 39-1029 AD NUMBER: 70-14-06 SUBJECT HEADING: Airworthiness Directives; Bell Model 206A Helicopters ACTION: SUMMARY: DATES: Effective August 16, 1970. ADDRESSES: FOR FURTHER INFORMATION CONTACT: SUPPLEMENTARY INFORMATION: REGULATORY TEXT: 70-14-06 BELL: Amendment 39-1029. Applies to Model 206A Helicopters, S/N 4 thru 448, 460 thru 464, 467, 469 thru 473 and 475 thru 477, certificated in all categories. Compliance required not later than 300 hours time in service after the effective date of this Airworthiness Directive, unless already accomplished. To relieve engine compressor flange loads, replace existing fire-wall-to-compressor seal with a new improved firewall seal kit, Bell Part No. 206-704-026-1, in accordance with applicable paragraphs of Bell Service Letter 206A-142, dated November 5, 1969, or later FAA approved revision. Equivalent methods of compliance must be approved by the Chief, Engineering and Manufacturing Branch, Flight Standards Division, Southwest Region, Federal Aviation Administration. This amendment becomes effective August 16, 1970. FOOTER:
Document Text
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AD Final Rules - DRS_70-14-06.html Copy URL Print/Save as PDF Document Versions Feedback Details AD Number: 70-14-06 Document Type: AD Final Rules Docket Number: Unknown Subject Heading: Airworthiness Directives; Bell Model 206A Helicopters Subject: Fire Wall To Compressor Seal Status: Current Citation: This information is not available. Citation Publish Date: Effective Date: 08/16/1970 Make: Bell Helicopter Textron Canada Limited Model: 206A 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: 70-14-06 CITATION: This information is not available. PAGE NUMBER: DOCKET NUMBER: Unknown AMENDMENT: 39-1029 AD NUMBER: 70-14-06 SUBJECT HEADING: Airworthiness Directives; Bell Model 206A Helicopters ACTION: SUMMARY: DATES: Effective August 16, 1970. ADDRESSES: FOR FURTHER INFORMATION CONTACT: SUPPLEMENTARY INFORMATION: REGULATORY TEXT: 70-14-06 BELL: Amendment 39-1029. Applies to Model 206A Helicopters, S/N 4 thru 448, 460 thru 464, 467, 469 thru 473 and 475 thru 477, certificated in all categories. Compliance required not later than 300 hours time in service after the effective date of this Airworthiness Directive, unless already accomplished. To relieve engine compressor flange loads, replace existing fire-wall-to-compressor seal with a new improved firewall seal kit, Bell Part No. 206-704-026-1, in accordance with applicable paragraphs of Bell Service Letter 206A-142, dated November 5, 1969, or later FAA approved revision. Equivalent methods of compliance must be approved by the Chief, Engineering and Manufacturing Branch, Flight Standards Division, Southwest Region, Federal Aviation Administration. This amendment becomes effective August 16, 1970. FOOTER:
Source: Official FAA Source ↗
Retrieved: Apr 8, 2026
Rights: U.S. Government Public Domain
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