89-19-02: Engine Fire Extinguishing System

89-19-02 BOEING OF CANADA, LTD., DE HAVILLAND DIVISION: Amendment 39- 6314. Applicability: Model DHC-8-100 series airplanes, and Model DHC-8-300 series airplanes, serial numbers 001 through 149, certificated in any category. Compliance: Required as indicated, unless previously accomplished. To ensure that the engine fire extinguishing system bottle squibs are connected to the proper actuating switch, accomplish the following: A. Within the next 70 hours time-in-service after the effective date of this AD, perform an inspection to verify proper installation of the fire bottle squib wiring in the engine fire extinguishing system, in accordance with the Accomplishment Instructions of de Havilland Alert Service Bulletin A8-26-8, dated March 20, 1989. If the connector identification sleeves are difficult to read or are damaged, or if it has not been confirmed that the installation is correct, prior to further flight, correct the wiring installation and verify properwiring in accordance with the service bulletin. NOTE: Airplanes on which this inspection and/or repair has previously been performed, as required by paragraphs A. and B. of Telegraphic AD T89-05-51, in accordance with Items 1 through 26 of de Havilland Alert Service Bulletin A8-26-7, dated February 24, 1989, are considered to have complied with the requirements of this paragraph. B. Within the next 120 hours time-in-service or 30 days after the effective date of this AD, whichever occurs first, install de Havilland Modification Number 8/1336, "Fire Protection - Fire Extinguisher Squib Electrical Connector Positioning," in accordance with the Accomplishment Instructions of de Havilland Service Bulletin 8-26-9, dated March 23, 1989. C. An alternate means of compliance or adjustment of the compliance time, which provides an acceptable level of safety, may be used when approved by the Manager, New York Aircraft Certification Office, FAA, Engine and Propeller Directorate.NOTE: The request should be forwarded through an FAA Principal Maintenance Inspector (PMI), who may add any comments and then send it to the Manager, New York Aircraft Certification Office. D. Special flight permits may be issued in accordance with FAR 21.197 and 21.199 to operate airplanes to a base in order to comply with the requirements of this AD. All persons affected by this directive who have not already received the appropriate service information from the manufacturer may obtain copies upon request to Boeing of Canada, Ltd., de Havilland Division, Garatt Boulevard, Downsview, Ontario M3K 1Y5, Canada. This information may be examined at the FAA, Northwest Mountain Region, Transport Airplane Directorate, 17900 Pacific Highway South, Seattle, Washington, or the New York Aircraft Certification Office, Engine and Propeller Directorate, 181 South Franklin Avenue, Room 202, Valley Stream, New York. This amendment (39-6314) supersedes Telegraphic AD T89-05-51, issued February 28, 1989. This amendment (39-6314, AD 89-19-02) becomes effective on September 19, 1989.