AD 82-12-03
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| aircraft | Textron Aviation Inc. | BH.125 Series 400A | Airworthiness Directives; BRITISH AEROSPACE (Hawker Siddeley) Model HS/BH/DH 125 Aircraft |
| aircraft | Textron Aviation Inc. | BH.125 Series 600A | Airworthiness Directives; BRITISH AEROSPACE (Hawker Siddeley) Model HS/BH/DH 125 Aircraft |
| aircraft | Textron Aviation Inc. | DH.125 Series 1A | Airworthiness Directives; BRITISH AEROSPACE (Hawker Siddeley) Model HS/BH/DH 125 Aircraft |
| aircraft | Textron Aviation Inc. | DH.125 Series 1A-522 | Airworthiness Directives; BRITISH AEROSPACE (Hawker Siddeley) Model HS/BH/DH 125 Aircraft |
| aircraft | Textron Aviation Inc. | DH.125 Series 1A/R-522 | Airworthiness Directives; BRITISH AEROSPACE (Hawker Siddeley) Model HS/BH/DH 125 Aircraft |
| aircraft | Textron Aviation Inc. | DH.125 Series 1A/S-522 | Airworthiness Directives; BRITISH AEROSPACE (Hawker Siddeley) Model HS/BH/DH 125 Aircraft |
| aircraft | Textron Aviation Inc. | DH.125 Series 3A | Airworthiness Directives; BRITISH AEROSPACE (Hawker Siddeley) Model HS/BH/DH 125 Aircraft |
| aircraft | Textron Aviation Inc. | DH.125 Series 3A/R | Airworthiness Directives; BRITISH AEROSPACE (Hawker Siddeley) Model HS/BH/DH 125 Aircraft |
| aircraft | Textron Aviation Inc. | DH.125 Series 3A/RA | Airworthiness Directives; BRITISH AEROSPACE (Hawker Siddeley) Model HS/BH/DH 125 Aircraft |
| aircraft | Textron Aviation Inc. | DH.125 Series 400A | Airworthiness Directives; BRITISH AEROSPACE (Hawker Siddeley) Model HS/BH/DH 125 Aircraft |
| aircraft | Textron Aviation Inc. | HS.125 Series 600A | Airworthiness Directives; BRITISH AEROSPACE (Hawker Siddeley) Model HS/BH/DH 125 Aircraft |
Unsafe Condition
Failure of the PE busbar and APU start circuit operation due to insufficient protection from overcurrent conditions.
AI-generated summary from the source AD text. Verify against the official source before acting.
Required Actions
Install a 275 ampere airfuse within 100 hours time in service after the effective date, following the instructions in British Aerospace Service Bulletin 49-23-(6525), Revision 5. Special flight permits may be used to operate to a base for compliance.
AI-generated summary from the source AD text. Verify against the official source before acting.
Compliance Time
within the next 100 hours time in service after the effective date of this AD
AI-generated summary from the source AD text. Verify against the official source before acting.
Affected Aircraft
BRITISH AEROSPACE (Hawker Siddeley) Model HS/BH/DH 125 aircraft up to and including Series 600A, serial numbers listed in Service Bulletin 49-23-(6525), Revision 5.
AI-generated summary from the source AD text. Verify against the official source before acting.
Federal Register Abstract
Ampere Airfuse Installation
Applicability Source Text
Show captured applicability text from the source AD
AD Final Rules - DRS_82-12-03.html Copy URL Print/Save as PDF Document Versions Feedback Details AD Number: 82-12-03 Document Type: AD Final Rules Docket Number: Unknown Subject Heading: Airworthiness Directives; BRITISH AEROSPACE (Hawker Siddeley) Model HS/BH/DH 125 Aircraft Subject: Ampere Airfuse Installation Status: Current Citation: This information is not available. Citation Publish Date: Effective Date: 06/08/1982 Make: Textron Aviation Inc. Model: BH.125 Series 400A | BH.125 Series 600A | DH.125 Series 1A | DH.125 Series 1A-522 | DH.125 Series 1A...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: 82-12-03 CITATION: This information is not available. PAGE NUMBER: DOCKET NUMBER: Unknown AMENDMENT: 39-4393 AD NUMBER: 82-12-03 SUBJECT HEADING: Airworthiness Directives; BRITISH AEROSPACE (Hawker Siddeley) Model HS/BH/DH 125 Aircraft ACTION: SUMMARY: DATES: Effective June 8, 1982. ADDRESSES: FOR FURTHER INFORMATION CONTACT: SUPPLEMENTARY INFORMATION: REGULATORY TEXT: 82-12-03 BRITISH AEROSPACE (Hawker Siddeley): Amendment 39-4393. Applies to all Model HS/BH/DH 125 aircraft up to and including Series 600A aircraft, certificated in all categories, S/Ns as listed in British Aerospace, Aircraft Group, 125 Series Aircraft Service Bulletin 49-23-(6525), Revision 5, dated August 18, 1981. Compliance is required as indicated unless already accomplished. To protect the PE busbar and ensure APU start circuit operation, accomplish the following: 1. Within the next 100 hours time in service after the effective date of this AD, install a 275 ampere airfuse in accordance with the applicable instructions in paragraph 2, "Accomplishment Instructions," of British Aerospace, Aircraft Group, 125 Series Aircraft Service Bulletin (SB) No. 49-23-(6525), Revision 5, dated August 18, 1981. 2. 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. 3. Alternate means of compliance which provide an equivalent level of safety may be used when approved by the Chief, Seattle Area Aircraft Certification Office, FAA Northwest Mountain Region. The manufacturer's specifications and procedures identified and described in this directive are incorporated herein and made a part hereof pursuant to 5 U.S.C. 552(a)(1). This amendment becomes effective June 8, 1982. FOOTER:
Document Text
Show stored source text (verify against official source)
AD Final Rules - DRS_82-12-03.html Copy URL Print/Save as PDF Document Versions Feedback Details AD Number: 82-12-03 Document Type: AD Final Rules Docket Number: Unknown Subject Heading: Airworthiness Directives; BRITISH AEROSPACE (Hawker Siddeley) Model HS/BH/DH 125 Aircraft Subject: Ampere Airfuse Installation Status: Current Citation: This information is not available. Citation Publish Date: Effective Date: 06/08/1982 Make: Textron Aviation Inc. Model: BH.125 Series 400A | BH.125 Series 600A | DH.125 Series 1A | DH.125 Series 1A-522 | DH.125 Series 1A...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: 82-12-03 CITATION: This information is not available. PAGE NUMBER: DOCKET NUMBER: Unknown AMENDMENT: 39-4393 AD NUMBER: 82-12-03 SUBJECT HEADING: Airworthiness Directives; BRITISH AEROSPACE (Hawker Siddeley) Model HS/BH/DH 125 Aircraft ACTION: SUMMARY: DATES: Effective June 8, 1982. ADDRESSES: FOR FURTHER INFORMATION CONTACT: SUPPLEMENTARY INFORMATION: REGULATORY TEXT: 82-12-03 BRITISH AEROSPACE (Hawker Siddeley): Amendment 39-4393. Applies to all Model HS/BH/DH 125 aircraft up to and including Series 600A aircraft, certificated in all categories, S/Ns as listed in British Aerospace, Aircraft Group, 125 Series Aircraft Service Bulletin 49-23-(6525), Revision 5, dated August 18, 1981. Compliance is required as indicated unless already accomplished. To protect the PE busbar and ensure APU start circuit operation, accomplish the following: 1. Within the next 100 hours time in service after the effective date of this AD, install a 275 ampere airfuse in accordance with the applicable instructions in paragraph 2, "Accomplishment Instructions," of British Aerospace, Aircraft Group, 125 Series Aircraft Service Bulletin (SB) No. 49-23-(6525), Revision 5, dated August 18, 1981. 2. 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. 3. Alternate means of compliance which provide an equivalent level of safety may be used when approved by the Chief, Seattle Area Aircraft Certification Office, FAA Northwest Mountain Region. The manufacturer's specifications and procedures identified and described in this directive are incorporated herein and made a part hereof pursuant to 5 U.S.C. 552(a)(1). This amendment becomes effective June 8, 1982. FOOTER:
Source: Official FAA Source ↗
Retrieved: Apr 8, 2026
Rights: U.S. Government Public Domain
This site is not affiliated with or endorsed by the FAA. Always verify with official sources.
Related Airworthiness Directives
2023-10-02
final ruleAirworthiness Directives; Transport and Commuter Category Airplanes
Unsafe Condition: Radio altimeter anomalies that are undetected by the automation or pilot, particularly close to the ground (e.g., landing flare), could lead to loss of continued safe flight and landing. Additional...
2011-01-09
final ruleAirworthiness Directives; B/E Aerospace Protective Breathing Equipment (PBE) Part Number 119003-11 Installed on Various Transport Airplanes
Unsafe Condition: Potentially defective potassium superoxide canisters used in PBE units could result in an exothermic reaction and ignition.
2006-01-04
final ruleAirworthiness Directives; Raytheon Model DH.125, HS.125, and BH.125 Series Airplanes; Model BAe.125 Series 800A (C-29A and U-125), 800B, 1000A, and 1000B Airplanes; and Model Hawker 800 (including variant U-125A), and 1000 Airplanes
Unsafe Condition: The fan venturi overheated and produced smoke while the airplane was on the ground, potentially causing heat and fire damage to adjacent equipment, which could result in smoke in the cabin and/or b...
2005-03-16
final ruleAirworthiness Directives; Raytheon Model DH.125, HS.125, and BH.125 Series Airplanes; BAe.125 Series 800A (C-29A and U-125) and 800B Airplanes; and Hawker 800 (Including Variant U-125A) and 800XP Airplanes; Equipped with TFE731 Engines
Unsafe Condition: Insulation on the wire harness passing through the firewall fairlead ignited on the fuselage side of the firewall, potentially causing ignition of outgassing wire insulation and leading to an uncon...
