AD 89-26-09
final rule
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| aircraft | BAE Systems (Operations) Limited | BAe 146-100A | Airworthiness Directives; BRITISH AEROSPACE Model 146-100A, -200A and -300A Series Airplanes |
| aircraft | BAE Systems (Operations) Limited | BAe 146-200A | Airworthiness Directives; BRITISH AEROSPACE Model 146-100A, -200A and -300A Series Airplanes |
| aircraft | BAE Systems (Operations) Limited | BAe 146-300A | Airworthiness Directives; BRITISH AEROSPACE Model 146-100A, -200A and -300A Series Airplanes |
Unsafe Condition
Loss of roll control could occur if a jam in the aileron control system happens due to potential failure modes in Fraser Nash Part Number AO-100-902 or Normalair-Garrett, Ltd. Part Numbers 1099R000, 1224R000, or 1295R000 aileron disconnect units (ADUs).
AI-generated summary from the source AD text. Verify against the official source before acting.
Required Actions
Determine installed ADU part numbers and modify NGL 1295R000 ADUs to BAe HCM70212C configuration. Inspect and replace failed Fraser Nash AO-100-902 and NGL 1099R000/1224R000 ADUs. Modify NGL 1099R000/1224R000 ADUs to BAe HCM70212A&B and HCM70212C configurations within one year.
AI-generated summary from the source AD text. Verify against the official source before acting.
Compliance Time
Within 60 days after the effective date of this AD and within one year after the effective date of this AD
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Affected Aircraft
BAE Systems (Operations) Limited Model BAe 146-100A, -200A, and -300A series airplanes certificated in any category.
AI-generated summary from the source AD text. Verify against the official source before acting.
Federal Register Abstract
Aileron Disconnect Units
Applicability Source Text
Show captured applicability text from the source AD
AD Final Rules - DRS_89-26-09.html Copy URL Print/Save as PDF Document Versions Feedback Details AD Number: 89-26-09 Document Type: AD Final Rules Docket Number: 88-NM-169-AD Subject Heading: Airworthiness Directives; BRITISH AEROSPACE Model 146-100A, -200A and -300A Series Airplanes Subject: Aileron Disconnect Units Status: Current Citation: This information is not available. Citation Publish Date: Effective Date: 01/14/1990 Make: BAE Systems (Operations) Limited Model: BAe 146-100A | BAe 146-200A | BAe 146-300A Product Type: Aircraft Product Subtype: Large Airplane Affected AD: Superseded AD: Affected By: Superseded By: Service/Office: Office of Primary Responsibility: CFR Part Reference: Part 39 Comments: AIRWORTHINESS DIRECTIVES FINAL RULES: 89-26-09 CITATION: This information is not available. PAGE NUMBER: DOCKET NUMBER: 88-NM-169-AD AMENDMENT: 39-6420 AD NUMBER: 89-26-09 SUBJECT HEADING: Airworthiness Directives; BRITISH AEROSPACE Model 146-100A, -200A and -300A Series Airplanes ACTION: SUMMARY: DATES: Effective on January 14, 1990. ADDRESSES: FOR FURTHER INFORMATION CONTACT: SUPPLEMENTARY INFORMATION: REGULATORY TEXT: 89-26-09 BRITISH AEROSPACE: Amendment 39-6420. Docket No. 88-NM-169-AD. Applicability: British Aerospace (BAe) Model 146-100A, -200A and -300A series airplanes, certificated in any category. Compliance: Required as indicated, unless previously accomplished. To prevent loss of roll control should a jam in aileron control system occur, accomplish the following: A. Within 60 days after the effective date of this AD: 1. Determine if Fraser Nash Part Number AO-100-902 aileron disconnect units (ADU's) or Normalair-Garrett, Ltd. (NGL) Part Numbers 1099R000, 1224R000, or 1295R000 ADU's are installed. If NGL Part Number 1295R000 ADU's modified to British Aerospace (BAe) Modification HCM70212C (NGL Modification No. 5RM) configuration are installed, no further action is required. 2. Modify NGL Part Number 1295R000 ADU's to BAe modification HCM70212C (NGL modification 5RM) configuration, in accordance with BAe Modification Service Bulletin 27-88-70212C, dated November 10, 1988. 3. Inspect Fraser Nash Part Number AO-100-902 and NGL Part Numbers 1099R000 and 1224R000 ADU's for dormant failure, in accordance with British Aerospace Inspection Service Bulletin 27-87, dated September 30, 1988. Replace any failed units with serviceable units prior to further flight. B. For all airplanes equipped with NGL Part Numbers 1099R000 and 1224R000 ADU's that have not been previously modified to BAe HCM 70212A&B (NGL Modification 3RM and 4RM) configuration: 1. Within one year after the effective date of this AD, modify NGL Part Number 1099R000 and 1224R000 ADU's to BAe HCM70212A&B (NGL Modification 3RM and 4RM) and BAe HCM70212C (NGL Modification 5RM) configuration, in accordance with BAe Modification Service Bulletins 27-75-70212A&B, dated June 16, 1988, and 27-88-70212C, dated November 10, 1988. NOTE: British Aerospace Modification Service Bulletin 27-75-70212A&B refers to NGL Service Bulletins 1099R-27-4 and 1224R-27-5. British Aerospace Modification Service Bulletin 27-88-70212C refers to NGL Service Bulletin 1295R-27-6, Revision 1, and NGL Service News Letter, dated September 12, 1988, for specific installation procedures. C. An alternate means of compliance or adjustment of the compliance time, which provides an acceptable level of safety, may be used when approved by the Manager, Standardization Branch, ANM-113, FAA, Northwest Mountain Region. NOTE: The request should be forwarded through an FAA Principal Maintenance Inspector (PMI), who will either concur or comment and then send it to the Manager, Standardization Branch, ANM-113. D. Special flight permits may be issued in accordance with FAR 21.197 and 21.199 to operate airplanes to a base in order to comply with the requirements of this AD. All persons affected by this directive who have not already received the appropriate service documents from the manufacturer may obtain copies upon request to British Aerospace, Librarian for Service Bulletins, P.O. Box 17414, Dulles International Airport, Washington, D.C. 20041. These documents may be examined at the FAA, Northwest Mountain Region, Transport Airplane Directorate, 17900 Pacific Highway South, Seattle, Washington, or the Standardization Branch, 9010 East Marginal Way South, Seattle, Washington. This amendment (39-6420, AD 89-26-09) becomes effective on January 14, 1990. FOOTER:
Document Text
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AD Final Rules - DRS_89-26-09.html Copy URL Print/Save as PDF Document Versions Feedback Details AD Number: 89-26-09 Document Type: AD Final Rules Docket Number: 88-NM-169-AD Subject Heading: Airworthiness Directives; BRITISH AEROSPACE Model 146-100A, -200A and -300A Series Airplanes Subject: Aileron Disconnect Units Status: Current Citation: This information is not available. Citation Publish Date: Effective Date: 01/14/1990 Make: BAE Systems (Operations) Limited Model: BAe 146-100A | BAe 146-200A | BAe 146-300A 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: 89-26-09 CITATION: This information is not available. PAGE NUMBER: DOCKET NUMBER: 88-NM-169-AD AMENDMENT: 39-6420 AD NUMBER: 89-26-09 SUBJECT HEADING: Airworthiness Directives; BRITISH AEROSPACE Model 146-100A, -200A and -300A Series Airplanes ACTION: SUMMARY: DATES: Effective on January 14, 1990. ADDRESSES: FOR FURTHER INFORMATION CONTACT: SUPPLEMENTARY INFORMATION: REGULATORY TEXT: 89-26-09 BRITISH AEROSPACE: Amendment 39-6420. Docket No. 88-NM-169-AD. Applicability: British Aerospace (BAe) Model 146-100A, -200A and -300A series airplanes, certificated in any category. Compliance: Required as indicated, unless previously accomplished. To prevent loss of roll control should a jam in aileron control system occur, accomplish the following: A. Within 60 days after the effective date of this AD: 1. Determine if Fraser Nash Part Number AO-100-902 aileron disconnect units (ADU's) or Normalair-Garrett, Ltd. (NGL) Part Numbers 1099R000, 1224R000, or 1295R000 ADU's are installed. If NGL Part Number 1295R000 ADU's modified to British Aerospace (BAe) Modification HCM70212C (NGL Modification No. 5RM) configuration are installed, no further action is required. 2. Modify NGL Part Number 1295R000 ADU's to BAe modification HCM70212C (NGL modification 5RM) configuration, in accordance with BAe Modification Service Bulletin 27-88-70212C, dated November 10, 1988. 3. Inspect Fraser Nash Part Number AO-100-902 and NGL Part Numbers 1099R000 and 1224R000 ADU's for dormant failure, in accordance with British Aerospace Inspection Service Bulletin 27-87, dated September 30, 1988. Replace any failed units with serviceable units prior to further flight. B. For all airplanes equipped with NGL Part Numbers 1099R000 and 1224R000 ADU's that have not been previously modified to BAe HCM 70212A&B (NGL Modification 3RM and 4RM) configuration: 1. Within one year after the effective date of this AD, modify NGL Part Number 1099R000 and 1224R000 ADU's to BAe HCM70212A&B (NGL Modification 3RM and 4RM) and BAe HCM70212C (NGL Modification 5RM) configuration, in accordance with BAe Modification Service Bulletins 27-75-70212A&B, dated June 16, 1988, and 27-88-70212C, dated November 10, 1988. NOTE: British Aerospace Modification Service Bulletin 27-75-70212A&B refers to NGL Service Bulletins 1099R-27-4 and 1224R-27-5. British Aerospace Modification Service Bulletin 27-88-70212C refers to NGL Service Bulletin 1295R-27-6, Revision 1, and NGL Service News Letter, dated September 12, 1988, for specific installation procedures. C. An alternate means of compliance or adjustment of the compliance time, which provides an acceptable level of safety, may be used when approved by the Manager, Standardization Branch, ANM-113, FAA, Northwest Mountain Region. NOTE: The request should be forwarded through an FAA Principal Maintenance Inspector (PMI), who will either concur or comment and then send it to the Manager, Standardization Branch, ANM-113. D. Special flight permits may be issued in accordance with FAR 21.197 and 21.199 to operate airplanes to a base in order to comply with the requirements of this AD. All persons affected by this directive who have not already received the appropriate service documents from the manufacturer may obtain copies upon request to British Aerospace, Librarian for Service Bulletins, P.O. Box 17414, Dulles International Airport, Washington, D.C. 20041. These documents may be examined at the FAA, Northwest Mountain Region, Transport Airplane Directorate, 17900 Pacific Highway South, Seattle, Washington, or the Standardization Branch, 9010 East Marginal Way South, Seattle, Washington. This amendment (39-6420, AD 89-26-09) becomes effective on January 14, 1990. FOOTER:
Source: Official FAA Source ↗
Retrieved: Apr 8, 2026
Rights: U.S. Government Public Domain
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