AD 98-16-25 Airworthiness Directives; Bombardier Model CL-600-2B19 (Regional Jet Series 100 and 200) Airplanes

Model CL-600-2B19 (Regional Jet Series 100 and 200) airplanes, serial numbers 7003 through 7157 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 (f)(1) 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 failure of attachment pins and the attachment pin end caps of the main landing gear (MLG), which could result in failure of the MLG, accomplish the following: Restatement of the Requirements of AD 96-22-14 (a) Serial Number Check. For airplanes having serial numbers 7003 through 7126 inclusive: Within 150 landings after November 21, 1996 (the effective date of AD 96-22-14, amendment 39-9803), check the serial number of each MLG shock strut lower attachment pin, part number 17144-1, in accordance with paragraphs 2.A. and 2.B. of the Accomplishment Instructions of Canadair Regional Jet Alert Service Bulletin S.B. A601R-32-062, Revision `C,' dated September 18, 1996; and paragraphs 2.A.(4), 2.B.(4), and 2.C.(3) of the Accomplishment Instructions of Messier-Dowty Service Bulletin M-DT 17002-32-10, Revision 3, dated September 6, 1996. (1) If the serial number is within the range of DCL206 through DCL259 inclusive, prior to further flight, remove the pin and install a new pin having a serial number outside (either higher or lower) of that range, in accordance with the service bulletins. Thereafter, inspect that replacement pin in accordance with paragraphs (b) and (c) of this AD. (2) If the serial number is outside of the range (higher or lower) of DCL206 through DCL259 inclusive, thereafter inspect the pin in accordance with paragraphs (b) and (c) of this AD. (b) In-Situ Visual Inspection. Within 150 landings after November 21, 1996, perform an in-situ visual inspection to detect discrepancies of the left- and right-hand shock strut of the MLG, in accordance with paragraphs 2.C. and 2.D. of the Accomplishment Instructions of Canadair Regional Jet Alert Service Bulletin S.B. A601R-32-062, Revision `C,' dated September 18, 1996; and paragraph 2.B.(1) of the Accomplishment Instructions of Messier-Dowty Service Bulletin M-DT 17002-32-10, Revision 3, dated September 6, 1996. Note 2: In-situ visual inspections that have been accomplished prior to November 21, 1996, in accordance with Messier-Dowty Service Bulletin M-DT 17002-32-10, dated June 13, 1996; Revision 1, dated June 29, 1996; or Revision 2, dated July 17, 1996; are considered acceptable for compliance with paragraph (b) of this amendment. (1) If no discrepancy is detected, repeat the in-situ visual inspection thereafter at intervals not to exceed every ``A'' check or 400 landings, whichever occurs later. (2) If any discrepancy is detected, prior to further flight, replace the discrepant part with a new part in accordance with the service bulletins. Thereafter, repeat the in-situ visual inspection at intervals not to exceed every ``A'' check or 400 landings, whichever occurs later. (c) Detailed Inspection. Within 3,000 landings since the date of airplane manufacture, or within 400 landings after November 21, 1996, whichever occurs later, perform a detailed inspection to detect discrepancies of the shock strut end caps and attachment pins of the MLG, in accordance with paragraphs 2.E. and 2.F. of the Accomplishment Instructions of Canadair Regional Jet Alert Service Bulletin S.B. A601R-32-062, Revision `C,' dated September 18, 1996; and paragraph 2.B.(2) of the Accomplishment Instructions of Messier- Dowty Service Bulletin M-DT 17002-32-10, Revision 3, dated September 6, 1996. Non-destructive testing (NDT) must be accomplished in accordance with the instructions provided or references referred [[Page 42219]] to in these service bulletins. Where instructions in those documents specify dye penetrant inspections (DPI), accomplish fluorescent penetrant (Type 1) inspections, sensitivity level 3 or higher, using material qualified to Military Standard MIL-I-25135. Note 3: Detailed inspections accomplished prior to November 21, 1996, in accordance with Messier-Dowty Service Bulletin M-DT 17002- 32-10, dated June 13, 1996; Revision 1, dated June 29, 1996; or Revision 2, dated July 17, 1996; are considered acceptable for compliance with paragraph (c) of this amendment. (1) If no discrepancy is detected, repeat the detailed inspection thereafter at intervals not to exceed 2,000 landings. (2) If any discrepancy is detected, prior to further flight, replace the discrepant part with a new part in accordance with the service bulletins. Repeat the detailed inspection thereafter at intervals not to exceed 2,000 landings. (d) As of November 21, 1996, no person shall install on any airplane an MLG shock strut lower attachment pin, part number 17144- 1, that has a serial number that is within the range of DCL206 through DCL259 inclusive. New Requirements of this AD (e) Within 6 months after the effective date of this AD, install new MLG shock strut upper and lower attachment pins in accordance with Canadair Regional Jet ServiceBulletin S.B. 601R-32-065, dated November 11, 1996. Accomplishment of this installation constitutes terminating action for the repetitive inspections required by paragraphs (b) and (c) of this AD. Note 4: The Canadair service bulletin references Messier-Dowty Service Bulletin M-DT 17002-32-12, dated November 6, 1996, as an additional source of service information to accomplish the installation. (f)(1) 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. (2) Alternative methods of compliance, approved previously in accordance with AD 96-22-14, amendment 39-9803, are approved as alternative methods of compliance with this AD. Note 5: Information concerning the existence of approved alternative methods of compliance with this AD, if any, may be obtained from the New York ACO. (g) 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. (h) The actions shall be done in accordance with Canadair Regional Jet Service Bulletin S.B. 601R-32-065, dated November 11, 1996; Messier-Dowty Service Bulletin No. M-DT 17002-32-10, Revision 3, dated September 6, 1996; and Canadair Regional Jet Alert Service Bulletin S.B. A601R-32-062, Revision `C,' dated September 18, 1996. 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. (1) The incorporation by reference of Canadair Regional Jet Service Bulletin S.B. 601R-32-065, dated November 11, 1996, 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 Messier-Dowty Service Bulletin No. M-DT 17002-32-10, Revision 3, dated September 6, 1996, and Canadair Regional Jet Alert Service Bulletin S.B. A601R-32-062, Revision `C,' dated September 18, 1996, was previously approved by the Director of the Federal Register as of November 21, 1996 (61 FR 57319, November 6, 1996). (3) 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, New York Aircraft Certification Office, Engine and Propeller Directorate, 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 6: The subject of this AD is addressed in Canadian airworthiness directive CF-96-12R1, dated January 29, 1997. (i) This amendment becomes effective on September 11, 1998. Issued in Renton, Washington, on July 31, 1998. Darrell M. Pederson, Acting Manager, Transport Airplane Directorate,Aircraft Certification Service. [FR Doc. 98-21098 Filed 8-6-98; 8:45 am] BILLING CODE 4910-13-P