AD 83-22-09
final rule
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| aircraft | Textron Aviation Inc. | HS.125 Series 600A | Airworthiness Directives; BRITISH AEROSPACE AIRCRAFT GROUP (HATFIELD-CHESTER DIVISION) Model HS 125 Series Aircraft |
| aircraft | Textron Aviation Inc. | HS.125 Series 700A | Airworthiness Directives; BRITISH AEROSPACE AIRCRAFT GROUP (HATFIELD-CHESTER DIVISION) Model HS 125 Series Aircraft |
Unsafe Condition
Failure of the cold air unit fan could result in fragmentation damaging the main engine beam.
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Required Actions
Install a fragmentation guard around the fan housing of the cold air unit per Service Bulletin 21-123-(2815), Revision 2. Alternate means of compliance may be approved by the FAA. Special flight permits may be issued under FAR 21.197 and 21.199.
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Compliance Time
within 120 days after the effective date of this AD
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Affected Aircraft
Model HS 125 (pre-Modification 251600) with serial numbers listed in the Planning Information of the service bulletin.
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Federal Register Abstract
Fragmentation Guard Installation
Applicability Source Text
Show captured applicability text from the source AD
AD Final Rules - DRS_83-22-09.html Copy URL Print/Save as PDF Document Versions Feedback Details AD Number: 83-22-09 Document Type: AD Final Rules Docket Number: Unknown Subject Heading: Airworthiness Directives; BRITISH AEROSPACE AIRCRAFT GROUP (HATFIELD-CHESTER DIVISION) Model HS 125 ...Show more Subject: Fragmentation Guard Installation Status: Current Citation: This information is not available. Citation Publish Date: Effective Date: 12/01/1983 Make: Textron Aviation Inc. Model: HS.125 Series 600A | HS.125 Series 700A Product Type: Aircraft Product Subtype: Large Airplane Affected AD: Superseded AD: Affected By: Superseded By: Service/Office: Office of Primary Responsibility: CFR Part Reference: Part 39 Comments: AIRWORTHINESS DIRECTIVES FINAL RULES: 83-22-09 CITATION: This information is not available. PAGE NUMBER: DOCKET NUMBER: Unknown AMENDMENT: 39-4754 AD NUMBER: 83-22-09 SUBJECT HEADING: Airworthiness Directives; BRITISH AEROSPACE AIRCRAFT GROUP (HATFIELD-CHESTER DIVISION) Model HS 125 Series Aircraft ACTION: SUMMARY: DATES: Effective December 1, 1983. ADDRESSES: FOR FURTHER INFORMATION CONTACT: SUPPLEMENTARY INFORMATION: REGULATORY TEXT: 83-22-09 BRITISH AEROSPACE AIRCRAFT GROUP (HATFIELD-CHESTER DIVISION): Amendment 39-4754. Applies to Model HS 125 (pre-Modification 251600) with serial numbers listed in the Planning Information of the service bulletin. Compliance required as indicated, unless already accomplished. To protect the main engine beam from a burst failure of the cold air unit fan, accomplish the following: A. Install a fragmentation guard around the fan housing of the cold air unit in accordance with the Accomplishment Instructions of British Aerospace Aircraft Group, Hatfield- Chester Division, 125 Series Aircraft Service Bulletin 21-123-(2815), Revision 2, dated October 29, 1982, within 120 days after the effective date of this AD. B. Alternate means of compliance which provide an equivalent level of safety may be used when approved by the Manager, Seattle Aircraft Certification Office, FAA, Northwest Mountain Region. C. Special flight permits may be issued in accordance with FAR 21.197 and 21.199 to operate airplanes to a base for the accomplishment of inspections and/or modifications required by this AD. This amendment becomes effective December 1, 1983. FOOTER:
Document Text
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AD Final Rules - DRS_83-22-09.html Copy URL Print/Save as PDF Document Versions Feedback Details AD Number: 83-22-09 Document Type: AD Final Rules Docket Number: Unknown Subject Heading: Airworthiness Directives; BRITISH AEROSPACE AIRCRAFT GROUP (HATFIELD-CHESTER DIVISION) Model HS 125 ...Show more Subject: Fragmentation Guard Installation Status: Current Citation: This information is not available. Citation Publish Date: Effective Date: 12/01/1983 Make: Textron Aviation Inc. Model: HS.125 Series 600A | HS.125 Series 700A Product Type: Aircraft Product Subtype: Large 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: 83-22-09 CITATION: This information is not available. PAGE NUMBER: DOCKET NUMBER: Unknown AMENDMENT: 39-4754 AD NUMBER: 83-22-09 SUBJECT HEADING: Airworthiness Directives; BRITISH AEROSPACE AIRCRAFT GROUP (HATFIELD-CHESTER DIVISION) Model HS 125 Series Aircraft ACTION: SUMMARY: DATES: Effective December 1, 1983. ADDRESSES: FOR FURTHER INFORMATION CONTACT: SUPPLEMENTARY INFORMATION: REGULATORY TEXT: 83-22-09 BRITISH AEROSPACE AIRCRAFT GROUP (HATFIELD-CHESTER DIVISION): Amendment 39-4754. Applies to Model HS 125 (pre-Modification 251600) with serial numbers listed in the Planning Information of the service bulletin. Compliance required as indicated, unless already accomplished. To protect the main engine beam from a burst failure of the cold air unit fan, accomplish the following: A. Install a fragmentation guard around the fan housing of the cold air unit in accordance with the Accomplishment Instructions of British Aerospace Aircraft Group, Hatfield- Chester Division, 125 Series Aircraft Service Bulletin 21-123-(2815), Revision 2, dated October 29, 1982, within 120 days after the effective date of this AD. B. Alternate means of compliance which provide an equivalent level of safety may be used when approved by the Manager, Seattle Aircraft Certification Office, FAA, Northwest Mountain Region. C. Special flight permits may be issued in accordance with FAR 21.197 and 21.199 to operate airplanes to a base for the accomplishment of inspections and/or modifications required by this AD. This amendment becomes effective December 1, 1983. FOOTER:
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Retrieved: Apr 8, 2026
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