# AD 92-10-04: Wing Skin Corrosion - Type: Airworthiness directive - Status: Current - Products: Textron 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3A, DH.125 Series 3A/R, DH.125 Series 3A/RA, DH.125 Series 400A and HS.125 Series 600A - Effective: June 11, 1992 - Superseded by: Nothing supersedes this AD - Product type: Aircraft, Large airplane - Amendment: 39-8238 - Docket: 91-NM-261-AD - Registered aircraft: 4 may be affected, by airframe or engine model (OpenAirDocs) - FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/3C7958216F3B928786256A1E0073643C.0001 - DRS record last changed: January 21, 2026 - Page: https://openairdocs.org/ad/92-10-04 ## The airworthiness directive 92-10-04 BRITISH AEROSPACE: Amendment 39-8238. Docket No. 91-NM-261-AD. Applicability: Model DH/BH/HS 125 series airplanes, excluding Model 125-700A, -800A, and -1000A series airplanes; as listed in British Aerospace Service Bulletin S.B. 57-73, dated July 30, 1991; certificated in any category. Compliance: Required as indicated, unless accomplished previously. To prevent reduced structural integrity of the wings, accomplish the following: (a) Within 3 months after the effective date of this AD, visually inspect left and right wing upper skins for corrosion beneath the boundary layer fence, in accordance with British Aerospace Service Bulletin S.B. 57-73, dated July 30, 1991. (1) If any corroded parts are found in which the corrosion is within the limits specified in British Aerospace Service Bulletin S.B. 57-73, dated July 30, 1991, prior to further flight, repair in accordance with that service bulletin. (2) If any corroded parts are found in which the corrosion exceeds the limits specified in British Aerospace Service Bulletin S.B. 57-73, dated July 30, 1991, prior to further flight, repair in accordance with a method approved by the Manager, Standardization Branch, ANM-113, FAA, Transport Airplane Directorate. (b) Within 10 days after accomplishing the inspection required by paragraph (a) of this AD, submit a report of inspection findings to British Aerospace, in accordance with Appendix A of British Aerospace Service Bulletin S.B. 57-73, dated July 30, 1991. Report all findings, including nil defects to: Service Support Manager, BAe 125, British Aerospace (Commercial Aircraft) Ltd., Corporate Aircraft Division (H121), Customer Support Department, Comet Way, Hatfield, Hertfordshire, AL 10 9TL, England; fax 0707 251216; telex 21429 (BAA HPS-G). Information collection requirements contained in this regulation have been approved by the Office of Management and Budget (OMB) under the provisions of the Paperwork ReductionAct of 1980 (44 U.S.C. 3501 et seq.) and have been assigned OMB Control Number 2120-0056. (c) 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, 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 inspections and repairs shall be done in accordance with British Aerospace Service Bulletin S.B. 57-73, dated July 30, 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. (f) This amendment becomes effective on June 11, 1992. ## 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 11 of 50 models: HS.125 Series 600A, DH.125 Series 1A/R-522, BH.125 Series 400A, BH.125 Series 600A, DH.125 Series 400A, DH.125 Series 3A/R, DH.125 Series 1A, DH.125 Series 1A-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: 4 (4 by airframe model, 0 by engine model) - Makers: Hawker Siddeley 4 Models with the most aircraft: - [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) All 2 models: https://openairdocs.org/ad/92-10-04/models.md Every aircraft: https://openairdocs.org/ad/92-10-04/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.