AD 87-17-04
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| aircraft | BAE Systems (Operations) Limited | BAe 146-100A | Airworthiness Directives; BRITISH AEROSPACE Model BAe-146 Series Airplanes |
| aircraft | BAE Systems (Operations) Limited | BAe 146-200A | Airworthiness Directives; BRITISH AEROSPACE Model BAe-146 Series Airplanes |
| aircraft | BAE Systems (Operations) Limited | BAe 146-300A | Airworthiness Directives; BRITISH AEROSPACE Model BAe-146 Series Airplanes |
Unsafe Condition
Loss of primary or secondary drive of the flap system torque limiter output due to excessive backlash in the torque limiter drive sprocket splines.
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Required Actions
Inspect torque limiter drive sprocket splines for excessive backlash and replace if necessary per BAe Alert Service Bulletin 27-A54, Rev 1. Repeat inspections per paragraphs 2A (every 600 landings) and 2B (every 300 landings) of the same bulletin. Modify flap drive system per BAe Modification Service Bulletin 27-54-70193A, Rev 1 to terminate repetitive inspections.
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Compliance Time
within 60 days after the effective date of this AD
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Affected Aircraft
BAE Systems (Operations) Limited Model BAe 146-100A, BAe 146-200A, BAe 146-300A airplanes listed in BAe-146 Service Bulletin 27-54-70193A, Rev 1
AI-generated summary from the source AD text. Verify against the official source before acting.
Federal Register Abstract
Flap System
Applicability Source Text
Show captured applicability text from the source AD
AD Final Rules - DRS_87-17-04.html Copy URL Print/Save as PDF Document Versions Feedback Details AD Number: 87-17-04 Document Type: AD Final Rules Docket Number: Unknown Subject Heading: Airworthiness Directives; BRITISH AEROSPACE Model BAe-146 Series Airplanes Subject: Flap System Status: Current Citation: This information is not available. Citation Publish Date: Effective Date: 09/14/1987 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Model: BAe 146-100A | BAe 146-200A | BAe 146-300A Product Type: Aircraft Product Subtype: Large Airplane Affected AD: Superseded AD: Affected By: Superseded By: Service/Office: Office of Primary Responsibility: CFR Part Reference: Part 39 Comments: AIRWORTHINESS DIRECTIVES FINAL RULES: 87-17-04 CITATION: This information is not available. PAGE NUMBER: DOCKET NUMBER: Unknown AMENDMENT: 39-5705 AD NUMBER: 87-17-04 SUBJECT HEADING: Airworthiness Directives; BRITISH AEROSPACE Model BAe-146 Series Airplanes ACTION: SUMMARY: DATES: Effective September 14, 1987. ADDRESSES: FOR FURTHER INFORMATION CONTACT: SUPPLEMENTARY INFORMATION: REGULATORY TEXT: 87-17-04 BRITISH AEROSPACE: Amendment 39-5705. Applies to Model BAe-146 series airplanes listed in British Aerospace BAe-146 Service Bulletin 27-54-70193A, Revision 1, dated June 3, 1986, certificated in any category. Compliance required within 60 days after the effective date of this AD, unless previously accomplished: To prevent the loss of primary or secondary drive of the flap system torque limiter output, accomplish the following: A. Inspect torque limiter drive sprocket splines for excessive backlash and replace, if necessary, in accordance with BAe Alert Service Bulletin 27-A54, Revision 1, dated April 22, 1986. B. Repeat the following inspections described in BAe Service Bulletin 27-A54, Revision 1, dated April 22, 1986; 1. Paragraph 2A: At intervals not exceeding 600 landings. 2. Paragraph 2B: At intervals not exceeding 300 landings. C. Modification of the flap drive system in accordance with BAe Modification Service Bulletin 27-54-70193A, Revision 1, dated June 3, 1986, constitutes terminating action for the repetitive inspection requirements of paragraph B., above. D. 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. E. 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. 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, Service Bulletin Librarian, P.O. Box 17414, Dulles International Airport, Washington, D.C. 20041. This document may be examined at the FAA, Northwest Mountain Region, 17900 Pacific Highway South, Seattle, Washington, or the Seattle Aircraft Certification Office, 9010 East Marginal Way South, Seattle, Washington. This amendment becomes effective September 14, 1987. FOOTER:
Document Text
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AD Final Rules - DRS_87-17-04.html Copy URL Print/Save as PDF Document Versions Feedback Details AD Number: 87-17-04 Document Type: AD Final Rules Docket Number: Unknown Subject Heading: Airworthiness Directives; BRITISH AEROSPACE Model BAe-146 Series Airplanes Subject: Flap System Status: Current Citation: This information is not available. Citation Publish Date: Effective Date: 09/14/1987 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: 87-17-04 CITATION: This information is not available. PAGE NUMBER: DOCKET NUMBER: Unknown AMENDMENT: 39-5705 AD NUMBER: 87-17-04 SUBJECT HEADING: Airworthiness Directives; BRITISH AEROSPACE Model BAe-146 Series Airplanes ACTION: SUMMARY: DATES: Effective September 14, 1987. ADDRESSES: FOR FURTHER INFORMATION CONTACT: SUPPLEMENTARY INFORMATION: REGULATORY TEXT: 87-17-04 BRITISH AEROSPACE: Amendment 39-5705. Applies to Model BAe-146 series airplanes listed in British Aerospace BAe-146 Service Bulletin 27-54-70193A, Revision 1, dated June 3, 1986, certificated in any category. Compliance required within 60 days after the effective date of this AD, unless previously accomplished: To prevent the loss of primary or secondary drive of the flap system torque limiter output, accomplish the following: A. Inspect torque limiter drive sprocket splines for excessive backlash and replace, if necessary, in accordance with BAe Alert Service Bulletin 27-A54, Revision 1, dated April 22, 1986. B. Repeat the following inspections described in BAe Service Bulletin 27-A54, Revision 1, dated April 22, 1986; 1. Paragraph 2A: At intervals not exceeding 600 landings. 2. Paragraph 2B: At intervals not exceeding 300 landings. C. Modification of the flap drive system in accordance with BAe Modification Service Bulletin 27-54-70193A, Revision 1, dated June 3, 1986, constitutes terminating action for the repetitive inspection requirements of paragraph B., above. D. 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. E. 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. 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, Service Bulletin Librarian, P.O. Box 17414, Dulles International Airport, Washington, D.C. 20041. This document may be examined at the FAA, Northwest Mountain Region, 17900 Pacific Highway South, Seattle, Washington, or the Seattle Aircraft Certification Office, 9010 East Marginal Way South, Seattle, Washington. This amendment becomes effective September 14, 1987. FOOTER:
Source: Official FAA Source ↗
Retrieved: Apr 8, 2026
Rights: U.S. Government Public Domain
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