AD 87-04-14
final rule
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| aircraft | BRITISH | DH/HS/BH-125 | Airworthiness Directives; BRITISH AEROSPACE Model DH/HS/BH-125 Series Airplanes |
Unsafe Condition
APU fuel leakage in the rear equipment bay and inadequate electrical bonding of the starter/generator to the airplane.
AI-generated summary from the source AD text. Verify against the official source before acting.
Required Actions
Seal the APU plenum shroud at the turbine plenum drain outlet per BAe Service Bulletin 49-31-9286A, Revision 1. Install twin heavy duty bonding cables between the APU accessory case and ground terminal post 16 on the main engine beam per BAe Service Bulletin 49-32-9210A, Revision 1.
AI-generated summary from the source AD text. Verify against the official source before acting.
Compliance Time
within 6 months after the effective date of this AD
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Affected Aircraft
British Aerospace Model DH/HS/BH-125 series airplanes identified in BAe Service Bulletins 49-31-9286A and 49-32-9210A, both Revision 1, dated March 24, 1986, certificated in any category.
AI-generated summary from the source AD text. Verify against the official source before acting.
Federal Register Abstract
Starter/Generator
Applicability Source Text
Show captured applicability text from the source AD
AD Final Rules - DRS_87-04-14.html Copy URL Print/Save as PDF Document Versions Feedback Details AD Number: 87-04-14 Document Type: AD Final Rules Docket Number: Unknown Subject Heading: Airworthiness Directives; BRITISH AEROSPACE Model DH/HS/BH-125 Series Airplanes Subject: Starter/Generator Status: Current Citation: This information is not available. Citation Publish Date: Effective Date: 03/09/1987 Make: Model: BH.125 Series 400A | BH.125 Series 600A | DH.125 Series 1A | DH.125 Series 1A/R-522 | DH.125 Series ...Show more Product Type: Aircraft Product Subtype: Large Airplane Affected AD: Superseded AD: Affected By: Superseded By: Service/Office: Office of Primary Responsibility: CFR Part Reference: Part 39 Comments: AIRWORTHINESS DIRECTIVES FINAL RULES: 87-04-14 CITATION: This information is not available. PAGE NUMBER: DOCKET NUMBER: Unknown AMENDMENT: 39-5540 AD NUMBER: 87-04-14 SUBJECT HEADING: Airworthiness Directives; BRITISH AEROSPACE Model DH/HS/BH-125 Series Airplanes ACTION: SUMMARY: DATES: Effective March 9, 1987. ADDRESSES: FOR FURTHER INFORMATION CONTACT: SUPPLEMENTARY INFORMATION: REGULATORY TEXT: 87-04-14 BRITISH AEROSPACE: Amendment 39-5540. Applies to British Aerospace (BAe) Model DH/HS/BH-125 series airplanes identified in BAe Service Bulletins 49-31-9286A and 49-32-9210A, both Revision 1, and both dated March 24, 1986, certificated in any category. Compliance is required within 6 months after the effective date of this AD. To reduce the possibility of APU fuel leakage in the rear equipment bay, and assure electrical bonding of the starter/generator to the airplane, accomplish the following, unless previously accomplished: A. Seal the APU plenum shroud at the turbine plenum drain outlet in accordance with BAe Service Bulletin 49-31-9286A, Revision 1, dated March 24, 1986, Modification No. 259286A. B. Install twin heavy duty bonding cables between the APU accessory case and ground terminal post 16 on the main engine beam in accordance with BAe Service Bulletin 49-32- 9210A, Revision 1, dated March 24, 1986, Modification No. 259210A. 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. D. 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 the 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, Inc., Librarian, Box 17414, Dulles International Airport, Washington, D.C. 20041. These documents 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 March 9, 1987. FOOTER:
Document Text
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AD Final Rules - DRS_87-04-14.html Copy URL Print/Save as PDF Document Versions Feedback Details AD Number: 87-04-14 Document Type: AD Final Rules Docket Number: Unknown Subject Heading: Airworthiness Directives; BRITISH AEROSPACE Model DH/HS/BH-125 Series Airplanes Subject: Starter/Generator Status: Current Citation: This information is not available. Citation Publish Date: Effective Date: 03/09/1987 Make: Model: BH.125 Series 400A | BH.125 Series 600A | DH.125 Series 1A | DH.125 Series 1A/R-522 | DH.125 Series ...Show more 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: 87-04-14 CITATION: This information is not available. PAGE NUMBER: DOCKET NUMBER: Unknown AMENDMENT: 39-5540 AD NUMBER: 87-04-14 SUBJECT HEADING: Airworthiness Directives; BRITISH AEROSPACE Model DH/HS/BH-125 Series Airplanes ACTION: SUMMARY: DATES: Effective March 9, 1987. ADDRESSES: FOR FURTHER INFORMATION CONTACT: SUPPLEMENTARY INFORMATION: REGULATORY TEXT: 87-04-14 BRITISH AEROSPACE: Amendment 39-5540. Applies to British Aerospace (BAe) Model DH/HS/BH-125 series airplanes identified in BAe Service Bulletins 49-31-9286A and 49-32-9210A, both Revision 1, and both dated March 24, 1986, certificated in any category. Compliance is required within 6 months after the effective date of this AD. To reduce the possibility of APU fuel leakage in the rear equipment bay, and assure electrical bonding of the starter/generator to the airplane, accomplish the following, unless previously accomplished: A. Seal the APU plenum shroud at the turbine plenum drain outlet in accordance with BAe Service Bulletin 49-31-9286A, Revision 1, dated March 24, 1986, Modification No. 259286A. B. Install twin heavy duty bonding cables between the APU accessory case and ground terminal post 16 on the main engine beam in accordance with BAe Service Bulletin 49-32- 9210A, Revision 1, dated March 24, 1986, Modification No. 259210A. 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. D. 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 the 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, Inc., Librarian, Box 17414, Dulles International Airport, Washington, D.C. 20041. These documents 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 March 9, 1987. FOOTER:
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Retrieved: Apr 8, 2026
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