99-19-39: Emergency Overwing Exit Hatches Insulation Blankets

99-19-39 BOMBARDIER, INC. (Formerly Canadair): Amendment 39-11326. Docket 99-NM-92-AD. Issued September 10, 1999. Applicability: Model CL-600-2B19 (Regional Jet Series 100) series airplanes, serial numbers 7003 through 7067 inclusive, and 7069 through 7292 inclusive; certificated in any category. NOTE 1: This AD applies to each airplane identified in the preceding applicability provision, regardless of whether it has been modified, altered, or repaired in the area subject to the requirements of this AD. For airplanes that have been modified, altered, or repaired so that the performance of the requirements of this AD is affected, the owner/operator must request approval for an alternative method of compliance in accordance with paragraph (b) of this AD. The request should include an assessment of the effect of the modification, alteration, or repair on the unsafe condition addressed by this AD; and, if the unsafe condition has not been eliminated, the request should include specific proposed actions to address it. Compliance: Required as indicated, unless accomplished previously. To prevent the freezing of moisture entrapped in the fiberglass/foam insulation installed on the fuselage structure between the overwing exit door and the fuselage door frame and intercostal, which could interfere with the opening of the overwing emergency exit hatches during an emergency evacuation of the airplane, accomplish the following: (a) Within 100 flight hours or 30 days after the effective date of this AD, whichever occurs first, remove the insulation blankets surrounding the emergency overwing exit hatches in accordance with Canadair Regional Jet Alert Service Bulletin S.B. A601R-25-152, Revision `A,' dated February 25, 1999. NOTE 2: Removal of the insulation blankets surrounding the emergency overwing exit hatches accomplished in accordance with Canadair Regional Jet Alert Service Bulletin S.B. A601R-25-152, dated December 26, 1998, priorto the effective date of this AD, is considered acceptable for compliance with paragraph (a) of this AD. Alternative Methods of Compliance (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, New York Aircraft Certification Office (ACO), FAA, Engine and Propeller Directorate. Operators shall submit their requests through an appropriate FAA Principal Maintenance Inspector, who may add comments and then send it to the Manager, New York ACO. NOTE 3: Information concerning the existence of approved alternative methods of compliance with this AD, if any, may be obtained from the New York ACO. Special Flight Permits (c) Special flight permits may be issued in accordance with sections 21.197 and 21.199 of the Federal Aviation Regulations (14 CFR 21.197 and 21.199) to operate the airplane to a location where the requirements of this AD can be accomplished. Incorporationby Reference (d) The removal shall be done in accordance with Canadair Regional Jet Alert Service Bulletin S.B. A601R-25-152, Revision `A,' dated February 25, 1999. 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 Bombardier, Inc., Canadair, Aerospace Group, P.O. Box 6087, Station Centre-ville, Montreal, Quebec H3C 3G9, Canada. Copies may be inspected at the FAA, Transport Airplane Directorate, 1601 Lind Avenue, SW., Renton, Washington; or at the FAA, Engine and Propeller Directorate, New York Aircraft Certification Office, 10 Fifth Street, Third Floor, Valley Stream, New York; or at the Office of the Federal Register, 800 North Capitol Street, NW., suite 700, Washington, DC. NOTE 4: The subject of this AD is addressed in Canadian airworthiness directive CF-99-01, dated February 9, 1999. (e) This amendment becomes effective on October 27, 1999.