AD 78-12-02
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| aircraft | British Aerospace, Aircraft Group | B.206 Series 2 | Airworthiness Directives; Scottish Aviation Limited "Beagle" Model B206 Series II Airplanes |
Unsafe Condition
Cracks, corrosion, or deterioration in exhaust system bellows assemblies (P/N CE20901 or CE 20806) could cause hot exhaust gases to escape and impinge on the tachometer electrical leads and other engine compartment components.
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Required Actions
Inspect exhaust system bellows assemblies for cracks, corrosion, and deterioration within 25 hours time in service after the AD's effective date. If no issues found, subsequent inspections at intervals not exceeding 50 hours or 3 months. Replace affected bellows assemblies if cracks, corrosion, or deterioration are found.
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Compliance Time
Within the next 25 hours time in service after the effective date of this AD
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Affected Aircraft
Scottish Aviation Limited Model B206 Series II airplanes with exhaust system bellows assembly Part Number CE20901 or CE20806 installed.
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Federal Register Abstract
Exhaust System Bellows Assembly
Applicability Source Text
Show captured applicability text from the source AD
AD Final Rules - DRS_78-12-02.html Copy URL Print/Save as PDF Document Versions Feedback Details AD Number: 78-12-02 Document Type: AD Final Rules Docket Number: Unknown Subject Heading: Airworthiness Directives; Scottish Aviation Limited "Beagle" Model B206 Series II Airplanes Subject: Exhaust System Bellows Assembly Status: Current Citation: This information is not available. Citation Publish Date: Effective Date: 06/22/1978 Make: British Aerospace, Aircraft Group Model: B.206 Series 2 Product Type: Aircraft Product Subtype: Small Airplane Affected AD: Superseded AD: Affected By: Superseded By: Service/Office: Office of Primary Responsibility: CFR Part Reference: Part 39 Comments: AIRWORTHINESS DIRECTIVES FINAL RULES: 78-12-02 CITATION: This information is not available. PAGE NUMBER: DOCKET NUMBER: Unknown AMENDMENT: 39-3230 AD NUMBER: 78-12-02 SUBJECT HEADING: Airworthiness Directives; Scottish Aviation Limited "Beagle" Model B206 Series II Airplanes ACTION: SUMMARY: DATES: Effective June 22, 1978. ADDRESSES: FOR FURTHER INFORMATION CONTACT: SUPPLEMENTARY INFORMATION: REGULATORY TEXT: 78-12-02 SCOTTISH AVIATION LIMITED: Amendment 39-3230. Applies to "Beagle" Model B206 Series II airplanes, certificated in all categories, which have exhaust system bellows assembly, P/N CE20901 or P/N CE 20806, installed. Compliance required as indicated, unless already accomplished. To minimize the possibility of hot exhaust gases escaping from a fractured exhaust bellows assembly and impinging on the tachometer electrical leads and other engine compartment components, accomplish the following: (a) Within the next 25 hours time in service after the effective date of this AD, inspect the exhaust system bellows assemblies, Part Number CE 20901 and Part Number CE 20806, for cracks, corrosion, and deterioration in accordance with paragraph 3(a) of Scottish Aviation Limited Service Bulletin No. B206/55 Issue 2, dated January 5, 1976, or an FAA approved equivalent, (hereinafter referred to as the Service Bulletin). (b) If a crack, corrosion, or deterioration is not found during the inspection required by paragraph (a) of this AD - (1) Within 50 hours time in service after the inspection required by paragraph (a) of this AD and, thereafter, at intervals not to exceed 50 hours time in service, inspect the bellows assemblies in accordance with paragraph 3(b) of the Service Bulletin; and (2) Within 100 hours time in service, or 3 months after the inspection required by paragraph (a), whichever occurs sooner, and, thereafter, at intervals not to exceed 100 hours time in service or 3 months, whichever occurs sooner, inspect the bellows assemblies in accordance with paragraph 3(a) of the Service Bulletin. (c) If a crack, corrosion, or deterioration is found during any inspection required by this AD, replace the affected bellows assembly with a serviceable part of the same part number. (d) For bellows assemblies installed as replacements - (1) Within 50 hours time in service after installation and, thereafter, at intervals not to exceed 50 hours time in service, inspect the bellows assemblies in accordance with paragraph 3(b) of the Service Bulletin; (2) Within 200 hours time in service, or 6 months, after installation, whichever occurs sooner, and, thereafter, at intervals not to exceed 100 hours time in service or 3 months, whichever occurs sooner, inspect the bellows assemblies in accordance with paragraph 3(a) of the Service Bulletin. This amendment becomes effective June 22, 1978. FOOTER:
Document Text
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AD Final Rules - DRS_78-12-02.html Copy URL Print/Save as PDF Document Versions Feedback Details AD Number: 78-12-02 Document Type: AD Final Rules Docket Number: Unknown Subject Heading: Airworthiness Directives; Scottish Aviation Limited "Beagle" Model B206 Series II Airplanes Subject: Exhaust System Bellows Assembly Status: Current Citation: This information is not available. Citation Publish Date: Effective Date: 06/22/1978 Make: British Aerospace, Aircraft Group Model: B.206 Series 2 Product Type: Aircraft Product Subtype: Small Airplane Affected AD: Superseded AD: Affected By: Superseded By: Service/Office: Office of Primary Responsibility: CFR Part Reference: Part 39 Comments: AIRWORTHINESS DIRECTIVES FINAL RULES: 78-12-02 CITATION: This information is not available. PAGE NUMBER: DOCKET NUMBER: Unknown AMENDMENT: 39-3230 AD NUMBER: 78-12-02 SUBJECT HEADING: Airworthiness Directives; Scottish Aviation Limited "Beagle" Model B206 Series II Airplanes ACTION: SUMMARY: DATES: Effective June 22, 1978. ADDRESSES: FOR FURTHER INFORMATION CONTACT: SUPPLEMENTARY INFORMATION: REGULATORY TEXT: 78-12-02 SCOTTISH AVIATION LIMITED: Amendment 39-3230. Applies to "Beagle" Model B206 Series II airplanes, certificated in all categories, which have exhaust system bellows assembly, P/N CE20901 or P/N CE 20806, installed. Compliance required as indicated, unless already accomplished. To minimize the possibility of hot exhaust gases escaping from a fractured exhaust bellows assembly and impinging on the tachometer electrical leads and other engine compartment components, accomplish the following: (a) Within the next 25 hours time in service after the effective date of this AD, inspect the exhaust system bellows assemblies, Part Number CE 20901 and Part Number CE 20806, for cracks, corrosion, and deterioration in accordance with paragraph 3(a) of Scottish Aviation Limited Service Bulletin No. B206/55 Issue 2, dated January 5, 1976, or an FAA approved equivalent, (hereinafter referred to as the Service Bulletin). (b) If a crack, corrosion, or deterioration is not found during the inspection required by paragraph (a) of this AD - (1) Within 50 hours time in service after the inspection required by paragraph (a) of this AD and, thereafter, at intervals not to exceed 50 hours time in service, inspect the bellows assemblies in accordance with paragraph 3(b) of the Service Bulletin; and (2) Within 100 hours time in service, or 3 months after the inspection required by paragraph (a), whichever occurs sooner, and, thereafter, at intervals not to exceed 100 hours time in service or 3 months, whichever occurs sooner, inspect the bellows assemblies in accordance with paragraph 3(a) of the Service Bulletin. (c) If a crack, corrosion, or deterioration is found during any inspection required by this AD, replace the affected bellows assembly with a serviceable part of the same part number. (d) For bellows assemblies installed as replacements - (1) Within 50 hours time in service after installation and, thereafter, at intervals not to exceed 50 hours time in service, inspect the bellows assemblies in accordance with paragraph 3(b) of the Service Bulletin; (2) Within 200 hours time in service, or 6 months, after installation, whichever occurs sooner, and, thereafter, at intervals not to exceed 100 hours time in service or 3 months, whichever occurs sooner, inspect the bellows assemblies in accordance with paragraph 3(a) of the Service Bulletin. This amendment becomes effective June 22, 1978. FOOTER:
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Retrieved: Apr 8, 2026
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