AD 95-13-04 Airworthiness Directives; Bombardier Model CL-600-2B19 (Regional Jet Series 100) Series Airplanes

Model CL-600-2B19 (Regional Jet Series 100) series airplanes, serial numbers 7003 and subsequent, certificated in any category.

Required as indicated, unless accomplished previously. To prevent a nose-up trim runaway, accomplish the following: (a) Within 24 hours after the effective date of this AD, accomplish the requirements of paragraphs (a)(1), (a)(2), and (a)(3) of this AD. (1) Install a placard adjacent to the primary flight display next to the airspeed limitation placard, to read: ``USE OF MACH TRIM IS PROHIBITED. IF THE AUTOPILOT IS DISENGAGED OR INOPERATIVE, RESTRICT SPEED TO 250 KIAS OR 0.7 MACH.'' (2) Revise the Limitations section of the FAA-approved Airplane Flight Manual (AFM) to include the following information. The requirements of this paragraph may be accomplished by inserting a copy of this AD, or Canadair Regional Jet Temporary Revision No. TR RJ/43, into the AFM. ``USE OF MACH TRIM IS PROHIBITED. IF THE AUTOPILOT IS DISENGAGED OR INOPERATIVE, RESTRICT SPEED TO 250 KIAS OR 0.7 MACH.'' Note 1: When the temporary revision has been incorporated in the general revisions of the AFM, the general revisions may be inserted in the AFM, provided the information contained in the general revision is identical to that specified in Canadair Regional Jet Temporary Revision No. TR RJ/43. (3) Revise the Limitations Section of the FAA-approved AFM to include the following information. The requirements of this paragraph may be accomplished by inserting a copy of this AD into the AFM. ``Prior to the accomplishment of Bombardier Alert Service Bulletin S.B. A601R-27-054, dated June 12, 1995, when the Mach trim system is disengaged, the ``MACH TRIM'' caution message will be displayed on the Engine Indication and Crew Alerting System (EICAS), and the Mach trim engage/disengage switch ``INOP'' legend will be illuminated. The EICAS message may be scrolled out of view prior to takeoff, but the switch ``INOP'' light will remain illuminated.'' (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 2: Information concerning the existence of approved alternative methods of compliance with this AD, if any, may be obtained from the New York ACO. (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. (d) This amendment becomes effective on August 14, 1995, to all persons except those persons to whom it was made immediately effective by priority letter AD 95-13-04, issued on June 16, 1995, which contained the requirements of this amendment. Issued in Renton, Washington, on July 24, 1995. Darrell M. Pederson, Acting Manager, Transport Airplane Directorate, Aircraft Certification Service. [FR Doc. 95-18585 Filed 7-27-95; 8:45 am] BILLING CODE 4910-13-U