AD 92-06-04
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| aircraft | Textron Aviation Inc. | BAe.125 Series 800A | BRITISH AEROSPACE Model BAe 125-800A Series Airplanes |
| aircraft | Textron Aviation Inc. | BAe.125 Series 800A (C-29A) | BRITISH AEROSPACE Model BAe 125-800A Series Airplanes |
| aircraft | Textron Aviation Inc. | BAe.125 Series 800A (U-125) | BRITISH AEROSPACE Model BAe 125-800A Series Airplanes |
Unsafe Condition
Internal arcing in the dimmer units and smoke emission into the cockpit.
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Required Actions
Install dimmer units with Page Modification AR1477, perform functional tests of the pilot's and co-pilot's instrument integral lighting dimmer system, and comply with British Aerospace Service Bulletin 33-44-7670A, Revision 1.
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Compliance Time
Within 60 days after the effective date of this AD
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Affected Aircraft
Model BAe 125-800A series airplanes, Post-Modification 253191A and Pre-Modification 253247A, certificated in any category.
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Federal Register Abstract
Dimmer System
Applicability Source Text
Show captured applicability text from the source AD
AD Final Rules - DRS_92-06-04.html Copy URL Print/Save as PDF Document Versions Feedback Details AD Number: 92-06-04 Document Type: AD Final Rules Docket Number: 91-NM-206-AD Subject Heading: BRITISH AEROSPACE Model BAe 125-800A Series Airplanes Subject: Dimmer System Status: Current Citation: This information is not available. Citation Publish Date: Effective Date: 04/21/1992 Make: Textron Aviation Inc. Model: BAe.125 Series 800A | BAe.125 Series 800A (C-29A) | BAe.125 Series 800A (U-125) Product Type: Aircraft Product Subtype: Large Airplane Affected AD: Superseded AD: Affected By: Superseded By: Service/Office: Office of Primary Responsibility: CFR Part Reference: Part 39 Comments: AIRWORTHINESS DIRECTIVES FINAL RULES: 92-06-04 CITATION: This information is not available. PAGE NUMBER: DOCKET NUMBER: 91-NM-206-AD AMENDMENT: 39-8184 AD NUMBER: 92-06-04 SUBJECT HEADING: BRITISH AEROSPACE Model BAe 125-800A Series Airplanes ACTION: SUMMARY: DATES: Effective April 21, 1992. ADDRESSES: FOR FURTHER INFORMATION CONTACT: SUPPLEMENTARY INFORMATION: REGULATORY TEXT: 92-06-04 BRITISH AEROSPACE: Amendment 39-8184. Docket No. 91-NM-206-AD. Applicability: Model BAe 125-800A series airplanes, Post-Modification 253191A and Pre-Modification 253247A, certificated in any category. Compliance: Required as indicated, unless accomplished previously. To prevent internal arcing in the dimmer units and smoke emission into the cockpit, accomplish the following: (a) Within 60 days after the effective date of this AD, modify the instrument integral lighting system by installing dimmer units having Page Modification AR1477 incorporated, and perform functional tests of the pilot's and co-pilot's instrument integral lighting dimmer system, in accordance with British Aerospace Service Bulletin 33-44-7670A, Revision 1, dated April 4, 1991. (b) An alternative method 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, Transport Airplane Directorate. The request shall be forwarded through an FAA Principal Maintenance Inspector, who may concur or comment and then send it to the Manager, Standardization Branch. (c) Special flight permits may be issued in accordance with FAR 21.197 and 21.199 to operate the airplane to a location where the requirements of this AD can be accomplished. (d) The modification shall be done in accordance with British Aerospace Service Bulletin 33- 44-7670A, Revision 1, dated April 4, 1991. This incorporation by reference was approved by the Director of the Federal Register in accordance with 5 U.S.C. 552(a) and 1 CFR Part 51. Copies may be obtained from British Aerospace, PLC, Librarian for Service Bulletins, P.O. Box 17414, Dulles International Airport, Washington, DC 20041-0414. Copies may be inspected at the FAA, Transport Airplane Directorate, 1601 Lind Avenue SW., Renton, Washington; or at the Office of the Federal Register, 1100 L Street NW., Room 8401, Washington, DC. (e) This amendment becomes effective on April 21, 1992. FOOTER:
Document Text
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AD Final Rules - DRS_92-06-04.html Copy URL Print/Save as PDF Document Versions Feedback Details AD Number: 92-06-04 Document Type: AD Final Rules Docket Number: 91-NM-206-AD Subject Heading: BRITISH AEROSPACE Model BAe 125-800A Series Airplanes Subject: Dimmer System Status: Current Citation: This information is not available. Citation Publish Date: Effective Date: 04/21/1992 Make: Textron Aviation Inc. Model: BAe.125 Series 800A | BAe.125 Series 800A (C-29A) | BAe.125 Series 800A (U-125) 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: 92-06-04 CITATION: This information is not available. PAGE NUMBER: DOCKET NUMBER: 91-NM-206-AD AMENDMENT: 39-8184 AD NUMBER: 92-06-04 SUBJECT HEADING: BRITISH AEROSPACE Model BAe 125-800A Series Airplanes ACTION: SUMMARY: DATES: Effective April 21, 1992. ADDRESSES: FOR FURTHER INFORMATION CONTACT: SUPPLEMENTARY INFORMATION: REGULATORY TEXT: 92-06-04 BRITISH AEROSPACE: Amendment 39-8184. Docket No. 91-NM-206-AD. Applicability: Model BAe 125-800A series airplanes, Post-Modification 253191A and Pre-Modification 253247A, certificated in any category. Compliance: Required as indicated, unless accomplished previously. To prevent internal arcing in the dimmer units and smoke emission into the cockpit, accomplish the following: (a) Within 60 days after the effective date of this AD, modify the instrument integral lighting system by installing dimmer units having Page Modification AR1477 incorporated, and perform functional tests of the pilot's and co-pilot's instrument integral lighting dimmer system, in accordance with British Aerospace Service Bulletin 33-44-7670A, Revision 1, dated April 4, 1991. (b) An alternative method 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, Transport Airplane Directorate. The request shall be forwarded through an FAA Principal Maintenance Inspector, who may concur or comment and then send it to the Manager, Standardization Branch. (c) Special flight permits may be issued in accordance with FAR 21.197 and 21.199 to operate the airplane to a location where the requirements of this AD can be accomplished. (d) The modification shall be done in accordance with British Aerospace Service Bulletin 33- 44-7670A, Revision 1, dated April 4, 1991. This incorporation by reference was approved by the Director of the Federal Register in accordance with 5 U.S.C. 552(a) and 1 CFR Part 51. Copies may be obtained from British Aerospace, PLC, Librarian for Service Bulletins, P.O. Box 17414, Dulles International Airport, Washington, DC 20041-0414. Copies may be inspected at the FAA, Transport Airplane Directorate, 1601 Lind Avenue SW., Renton, Washington; or at the Office of the Federal Register, 1100 L Street NW., Room 8401, Washington, DC. (e) This amendment becomes effective on April 21, 1992. FOOTER:
Source: Official FAA Source ↗
Retrieved: Apr 8, 2026
Rights: U.S. Government Public Domain
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