# AD 93-23-08: Battery and Emergency Contactors - Type: Airworthiness directive - Status: Current - Products: Textron BAe.125 Series 1000B, BAe.125 Series 800A, BAe.125 Series 800A (C-29A), BAe.125 Series 800A (U-125), BAe.125 Series 800B, BH.125 Series 400A, BH.125 Series 600A, DH.125 Series 1A, DH.125 Series 1A-522, DH.125 Series 1A/R-522, DH.125 Series 1A/S-522, DH.125 Series 3A and 29 more - Effective: December 29, 1993 - Superseded by: Nothing supersedes this AD - Product type: Aircraft, Large airplane - Amendment: 39-8742 - Docket: 92-NM-245-AD - Registered aircraft: 111 may be affected, by airframe or engine model (OpenAirDocs) - FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/AEFE7A7E754A0CA186256A09005E4140.0001 - DRS record last changed: January 21, 2026 - Page: https://openairdocs.org/ad/93-23-08 ## The airworthiness directive 93-23-08 CORPORATE JETS LIMITED (FORMERLY BRITISH AEROSPACE): Amendment 39-8742. Docket 92-NM-245-AD. Applicability: Model DH/BH/HS/BAe 125 series airplanes, excluding Model BAe 125-1000A series airplanes; equipped with Garrett Model TFE 731-3 series engines; as listed in Corporate Jets Limited Service Bulletin SB.24-293-3501A,B,C,D,E,F, & G, Revision 2, dated March 31, 1993; certificated in any category. Compliance: Required as indicated, unless accomplished previously. To prevent overheating of the battery contactors and emergency contactors and a potential fire in the rear equipment bay, accomplish the following: (a) For Model BAe 125-800A series airplanes: Within 6 months after the effective date of this AD, modify the mounting arrangements of the battery contactors and emergency contactors in the rear equipment bay, Modification Number 253501, Parts A, B, F, & G, as appropriate; and prior to further flight, perform a functional test; in accordance withCorporate Jets Limited Service Bulletin SB.24-293-3501A,B,C,D,E,F, & G, Revision 2, dated March 31, 1993. (b) For all other airplanes: Within 6 months after the effective date of this AD, modify the mounting arrangements of the battery contactors and emergency contactors in the rear equipment bay, Modification Number 253501, Parts C, D, & E, as appropriate; and prior to further flight, perform a functional test; in accordance with Corporate Jets Limited Service Bulletin SB.24-293-3501A,B,C,D, & E, Revision 1, dated February 4, 1993; or SB.24-293-3501A,B,C,D,E,F, & G, Revision 2, dated March 31, 1993. (c) An alternative method of compliance or adjustment of the compliance time that provides an acceptable level of safety may be used if approved by the Manager, Standardization Branch, ANM-113, FAA, Transport Airplane Directorate. Operators shall submit their requests through an appropriate FAA Principal Maintenance Inspector, who may add comments and then send it to the Manager, Standardization Branch, ANM-113. NOTE: Information concerning the existence of approved alternative methods of compliance with this AD, if any, may be obtained from the Standardization Branch, ANM-113. (d) 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. (e) The modifications and tests shall be done in accordance with Corporate Jets Limited Service Bulletin SB.24-293-3501A,B,C,D, & E, Revision 1, dated February 4, 1993; or Corporate Jets Limited Service Bulletin SB.24-293-3501A,B,C,D,E,F, & G, Revision 2, dated March 31, 1993; as applicable. (NOTE: The issue date of Service Bulletins SB.24-293-3501A,B,C,D, & E and SB.24-293-3501A,B,C,D,E,F, & G is indicated only on page 1 of each document; no other page of these documents is dated.) 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 Corporate Jets, Inc., 22070 Broderick Drive, Sterling, Virginia 20166. Copies may be inspected at the FAA, Transport Airplane Directorate, 1601 Lind Avenue, SW., Renton, Washington; or at the Office of the Federal Register, 800 North Capitol Street, NW., suite 700, Washington, DC. (f) This amendment becomes effective on December 29, 1993. ## Affected data sheets (1) (OpenAirDocs) The type certificate data sheets whose models the AD names. - [TCDS A3EU](https://openairdocs.org/tcds/A3EU): Textron Aviation Inc.; names 39 of 50 models: HS.125 Series 3B/RB, HS.125 Series 401B, HS.125 Series 600A, HS.125 Series 600B/2, HS.125 Series 403A(C), HS.125 Series 600B/1, HS.125 Series 700A, DH.125 Series 1A/R-522… ## Registered aircraft it may apply to (OpenAirDocs) Matched by airframe and engine model; the AD's applicability may narrow it by serial number, part number or equipment. - Aircraft: 111 (111 by airframe model, 0 by engine model) - Makers: British Aerospace 80, Hawker Siddeley 11, Corporate Jets 8, Raytheon Corporate Jets 8, Raytheon 3, Hawker Beechcraft 1 Models with the most aircraft: - [British Aerospace BAE 125 SERIES 800A](https://openairdocs.org/model/british-aerospace-bae-125-series-800a): 61 aircraft (airframe model) - [British Aerospace HS 125-700A](https://openairdocs.org/model/british-aerospace-hs-125-700a): 14 aircraft (airframe model) - [Corporate Jets BAE 125-800A](https://openairdocs.org/model/corporate-jets-bae-125-800a): 8 aircraft (airframe model) - [Raytheon Corporate Jets BAE 125-800A](https://openairdocs.org/model/raytheon-corporate-jets-bae-125-800a): 8 aircraft (airframe model) - [Hawker Siddeley HS.125 SERIES 700A](https://openairdocs.org/model/hawker-siddeley-hs-125-series-700a): 7 aircraft (airframe model) - [British Aerospace BAE 125-800A](https://openairdocs.org/model/british-aerospace-bae-125-800a): 5 aircraft (airframe model) - [Hawker Siddeley BH.125-400A](https://openairdocs.org/model/hawker-siddeley-bh-125-400a): 2 aircraft (airframe model) - [Hawker Siddeley DH.125-3A/RA](https://openairdocs.org/model/hawker-siddeley-dh-125-3a-ra): 2 aircraft (airframe model) - [Raytheon BAE 125-800A](https://openairdocs.org/model/raytheon-bae-125-800a): 2 aircraft (airframe model) - [Hawker Beechcraft BAE 125-800B](https://openairdocs.org/model/hawker-beechcraft-bae-125-800b): 1 aircraft (airframe model) - [Raytheon HS 125-700A](https://openairdocs.org/model/raytheon-hs-125-700a): 1 aircraft (airframe model) All 12 models: https://openairdocs.org/ad/93-23-08/models.md Every aircraft: https://openairdocs.org/ad/93-23-08/aircraft.md Its text cites no advisory circulars or STCs. --- OpenAirDocs.org is an independent research project of [Contrail Labs](https://contraillabs.com/). It is not affiliated with the FAA or the NTSB. Source documents are U.S. government works in the public domain.