AD 2003-11-20 Airworthiness Directives; Bombardier Model CL-600-2B19 (Regional Jet Series 100 & 440) Airplanes

Model CL-600-2B19 (Regional Jet Series 100 & 440) airplanes, certificated in any category.

Required as indicated, unless accomplished previously. To prevent temporary loss of braking action due to the freezing of moisture on the input plunger of the brake control valve during steep descent, accomplish the following: Requirements of AD 93-21-04 Lubrications (a) Within 3 days after February 4, 1994 (the effective date of AD 93-21-04, amendment 39-8801), and thereafter at intervals not to exceed 3 days, lubricate, with grease, the sliding shaft of the input plunger of the brake control valve assembly, per Canadair Regional Jet Alert Service Bulletin S.B.A601R-32-016, dated October 14, 1993, until modification of the brake control valve, as required by paragraph (b) of this AD, is accomplished. New Actions Required by This AD Modification (b) Within 12 months after the effective date of this AD: Modify the brake control valve assembly by accomplishing all the actions (including the application of grease to the grease fittings) specified in Bombardier Service Bulletin 601R-32-017, dated November 9, 1993, per the service bulletin. Such modification terminates the repetitive lubrications of the sliding shaft of the input plunger of the brake control valve assembly required by paragraph (a) of this AD. Repetitive Lubrications (c) Within 1,500 flight hours after doing the modification required by paragraph (b) of this AD, and thereafter at intervals not to exceed 1,500 flight hours, lubricate with grease the brake control valve per paragraph 2.B.(18) of the Accomplishment Instructions of Bombardier Service Bulletin 601R-32-017, dated November 9, 1993. Alternative Methods of Compliance (d)(1) In accordance with 14 CFR 39.19, the Manager, New York Aircraft Certification Office (ACO), FAA, is authorized to approve alternative methods of compliance for this AD. (2) Alternative methods of compliance, approved previously in accordance with AD 93-21-04, amendment 39-8801, are approved as alternative methods of compliance with paragraph (a) of this AD. Incorporation by Reference (e) The actions shall be done in accordance with Canadair Regional Jet Alert Service Bulletin S.B.A601R-32-016, dated October 14, 1993; and Bombardier Service Bulletin 601R-32-017, dated November 9, 1993; as applicable. (1) The incorporation by reference of Bombardier Service Bulletin 601R-32-017, dated November 9, 1993, is approved by the Director of the Federal Register in accordance with 5 U.S.C. 552(a) and 1 CFR part 51. (2) The incorporation by reference of Canadair Regional Jet Alert Service Bulletin S.B.A601R-32-016, dated October 14, 1993, was approved previously by the Director of the Federal Register as of February 4, 1994 (59 FR 2952, January 20, 1994). (3) Copies of these service bulletins 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, New York Aircraft Certification Office (ACO), 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 1: The subject of this AD is addressed in Canadian airworthiness directive CF-93-26R2, dated January 18, 1994. Effective Date (f) This amendment becomes effective on July 11, 2003. Issued in Renton, Washington, on May 28, 2003. Ali Bahrami, Acting Manager, Transport Airplane Directorate, Aircraft Certification Service. [FR Doc. 03-13975 Filed 6-5-03; 8:45 am] BILLING CODE 4910-13-P