AD 99-26-16 Airworthiness Directives; Bombardier Model CL-600-1A11 (CL-600), CL-600-2A12 (CL-601), and CL-600-2B16 (CL-601-3A, CL-601-3R, and CL- 604) Series Airplanes

Model CL-600-1A11 (CL-600) series airplanes, serial numbers 1004 through 1085 inclusive; Model CL-600-2A12 (CL- 601) series airplanes, serial numbers 3001 through 3066 inclusive; Model CL-600-2B16 (CL-601-3A, CL-601-3R, and CL-604) series airplanes, serial numbers 5001 through 5194 inclusive, and 5301 through 5317 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.

Required as indicated, unless accomplished previously. To prevent damage to hydraulic and fuel lines resulting from failure of a main landing gear (MLG), which could cause a fire in the MLG wheel well, accomplish the following: Inspection and Modification (a) Within 300 landings or 12 months after the effective date of this AD, whichever occurs first, accomplish the actions in paragraph (a)(1), (a)(2), or (a)(3) of this AD, as applicable. (1) For Model CL-600-1A11 (CL-600) series airplanes: Remove the five existing hydraulic tube assemblies from the MLG bay, install six new re-routed hydraulic tube assemblies, and reposition a fuel line, in accordance with Bombardier Service Bulletin 600-0671, dated August 4, 1997. (2) For Model CL-600-2A12 (CL-601) and CL-600-2B16 (CL-601-3A and -3R) series airplanes: Remove the five existing hydraulic tube assemblies from the MLG bay, and install six new re-routed hydraulic tube assemblies, in accordance with Bombardier Service Bulletin 601- 0482, dated April 15, 1997. (3) For Model CL-600-2B16 (CL-604) series airplanes: Perform a general visual inspection of the routing of the hydraulic and fuel lines in the MLG bay in accordance with Bombardier Service Bulletin 604-29-001, dated December 20, 1996. Note 2: For the purposes of this AD, a general visual inspection is defined as: ``A visual examination of an interior or exterior area, installation, or assembly to detect obvious damage, failure, or irregularity. This level of inspection is made under normally available lighting conditions such as daylight, hangar lighting, flashlight, or drop-light, and may require removal or opening of access panels or doors. Stands, ladders, or platforms may be required to gain proximity to the area being checked.'' (i) If all hydraulic lines are routed in accordance with the service bulletin, no further action is required by this paragraph. (ii) If any hydraulic line is not routed in accordance with the service bulletin, prior to further flight, repair in accordance with a method approved by the Manager, New York Aircraft Certification Office (ACO), FAA, Engine and Propeller Directorate. 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 ACO. 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. Incorporation by Reference (d) Except as provided in paragraph (a)(3)(ii), the actions shall be done in accordance with Bombardier Service Bulletin 600- 0671, dated August 4, 1997; Bombardier Service Bulletin 601-0482, dated April 15, 1997; and Bombardier Service Bulletin 604-29-001, dated December 20, 1996, as applicable. 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 Centreville, Montreal, Quebec H3C 3G9, Canada. Copies may be inspected at the FAA, Transport Airplane Directorate, 1601 Lind Avenue, [[Page 72530]] 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-99-14, dated May 7, 1999. (e) This amendment becomes effective on February 1, 2000. Issued in Renton, Washington, on December 16, 1999. D. L. Riggin, Acting Manager, Transport Airplane Directorate, Aircraft Certification Service. [FR Doc. 99-33168 Filed 12-27-99; 8:45 am] BILLING CODE 4910-13-U