92-18-10 BRITISH AEROSPACE: Amendment 39-8354. Docket 92-NM-34-AD.
Applicability: Model ATP series airplanes; serial numbers 2001 through 2045, inclusive; which have been modified in accordance with Pratt and Whitney Service Bulletin PW100-72-21097, dated November 8, 1991; certificated in any category.
Compliance: Required as indicated, unless accomplished previously.
To prevent severe structural damage to the airplane due to an internal engine fire within the intercompressor case, accomplish the following:
(a) Within 90 days after modification in accordance with Pratt and Whitney Service Bulletin PW100-72-21097, dated November 8, 1991, or within 90 days after the effective date of this AD, whichever occurs later:
(1) Install an intercompressor case (ICC) fire detector system, in accordance with British Aerospace Service Bulletin ATP-26-5-35225A, dated October 30, 1991.
(2) Revise Section 0.25.0 of the FAA-approved Airplane Flight Manual (AFM) to include the following statement. This may be accomplished by inserting a copy of this AD in the AFM.
"Modification No.
Description
35225A
Introduction of ICC Fire Detector at the Intercompressor Case."
(3) Revise the FAA-approved AFM to include operating information pertaining to the ICC fire detection systems. This may be accomplished by inserting a copy of Temporary Revision No. T/24, Issue 1, dated February 17, 1992, into the AFM.
(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.
(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 installation and revision of the AFM shall be done in accordance with Temporary Revision No. T/24, Issue 1, dated February 17, 1992; and British Aerospace Service Bulletin ATP-26-5-35225A, dated October 30, 1991, which contains the following list of effective pages:
Page Number
Revision Level
Date
1-7, 9, 11, 13,
15, 17, 19, 21,
23, 25, 27, 29,
31, 33, 35, 37,
39, 41, 43
Original
October 30, 1991
8, 10, 12, 14, 16,
18, 20, 22, 24, 26,
28, 30, 32, 34, 36,
38, 40, 42
(These pages are not used)
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, 800 North Capitol Street, NW., Suite 700, Washington, DC.
(e) This amendment becomes effective on October 13, 1992.