88-18-02 BOEING OF CANADA, LTD., DE HAVILLAND DIVISION: Amendment 39- 5999. Applies to all Model DHC-8-100 series airplanes, certificated in any category.
Compliance required as indicated, unless previously accomplished.
To prevent ingestion of flammable fluids into the engine starter-generator, which could cause a fire in the nacelle, accomplish the following:
A. Within five calendar days after the effective date of this AD, and thereafter every time the brush access cover band has been loosened or whenever a starter-generator is replaced, position, secure, and re-safetywire the brush access cover band on each engine starter-generator, in accordance with Lucas Aerospace Service Information Letter No. 23088-00X-03, dated June 20, 1988.
B. Within 150 flight hours after the effective date of this AD, seal the openings around the terminal post conductor bars where they enter the generator case by either using a Lucas Aerospace Power Equipment Corporation (Lucas Aerospace) grommet, Part Number 23088-1290; or applying a fillet of Dow Corning RTB-738 sealing compound and MIL-P-46112B Kapton sheet, in accordance with Lucas Aerospace Service Information Letter No. 23088-00X-04, Revision 1, dated July 28, 1988.
NOTE: Care should be exercised to ensure excess sealant is not allowed to enter the interior of the starter-generator. Also, verify that sealed joint has cured in accordance with manufacturer's instructions prior to operation of the engine.
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, New England Region.
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 and21.199 to operate airplanes to a base for the accomplishment of inspections and/or modifications required by 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, Garratt Boulevard, Downsview, Ontario M3K 1Y5, Canada. This information may be examined at FAA, Northwest Mountain Region, 17900 Pacific Highway South, Seattle, Washington, or at FAA, New England Region, New York Aircraft Certification Office, 181 South Franklin Avenue, Room 202, Valley Stream, New York.
This amendment, 39-5999, becomes effective September 2, 1988.