AD 93-01-10

93-01-10 BRITISH AEROSPACE: Amendment 39-8464. Docket 92-NM-90-AD.

Applicability: Model DH/HS/BAe 125 series airplanes equipped with Garrett engines; as listed in British Aerospace Service Bulletin SB.24-289-3267A,B,C,D,E, F & G, Revision 1, dated April 10, 1992; certificated in any category.

Compliance: Required as indicated, unless accomplished previously.

To prevent battery overheating and/or damage of voltage sensitive avionics equipment, accomplish the following:

(a) Within 180 days after the effective date of this AD, modify the Generator Control Circuit (GCU) circuitry in accordance with British Aerospace Service Bulletin SB.24-289-3267A,B,C,D,E,F & G, Revision 1, dated April 10, 1992.

(b) 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.

(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 SB.24-289-3267A,B,C,D,E,F & G, Revision 1, dated April 10, 1992. (NOTE: The issue date of this British Aerospace Service Bulletin SB.24-289-326-7A,B,C,D,E,F & G is indicated only on "page 1 of 57"; no other page of this document 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 British Aerospace, PLC, Librarian for Service Bulletins, P.O. Box 17414, Dulles International Airport, Washington, DC. 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.

(e) This amendment becomes effective on March 2, 1993.