AD 2006-25-16 Airworthiness Directives; Bombardier Model CL-600-1A11 (CL-600), CL-600-2A12 (CL-601), and CL-600-2B16 (CL-601-3A and CL-601-3R) Airplanes

This AD applies to all Bombardier Model CL-600-1A11 (CL-600), CL-600-2A12 (CL-601), and CL-600-2B16 (CL-601-3A and CL-601-3R) airplanes, certificated in any category.

You are responsible for having the actions required by this AD performed within the compliance times specified, unless the actions have already been done. Manual References (f) The term “the Manual,” as used in this AD, means the documents specified in paragraphs (f)(1), (f)(2), and (f)(3) of this AD, as applicable. Although the Manual specifies to submit certain information to the manufacturer, this AD requires reporting only Level 3 corrosion. (1) For Model CL-600-1A11 (CL-600) airplanes: Bombardier Challenger 600 Time Limits/Maintenance Checks (CPCP) Supplement, PSP 605 (CPCP), dated July 28, 2004; (2) For Model CL-600-2A12 (CL-601) airplanes: Bombardier Challenger 601 Time Limits/Maintenance Checks (CPCP) Supplement, PSP 601-5 (CPCP), dated July 28, 2004; and (3) For Model CL-600-2B16 (CL-601-3A and CL-601-3R) airplanes: Bombardier Challenger 601 Time Limits/Maintenance Checks (CPCP) Supplement, PSP 601A-5 (CPCP), dated July 28, 2004. Initial Inspections (g) At the later of the times specified in paragraphs (g)(1) and (g)(2) of this AD: Perform each of the corrosion prevention and control program (CPCP) tasks, including re-protection actions, as applicable, specified in Paragraph 9, “List of Tasks,” of the applicable Manual, in accordance with the procedures specified in the applicable Manual. (1) Within 12 months after the effective date of this AD. (2) At the next CPCP task interval specified in the “Interval” column in the applicable table in Paragraph 9, “List of Tasks,” of the applicable Manual. The times in the “Interval” column are in flight hours unless there is an “M” adjacent to the number. If there is an “M” adjacent to the number, the time is in months. If there are two different numbers for a task, the number with a “T” adjacent to it is the threshold and the number with an “R” adjacent to it is the repetitive interval. Repetitive Inspections (h) After accomplishment of each initial CPCP task required by paragraph (g) of this AD, except as provided by paragraph (i) of this AD: Repeat each of the CPCP tasks, and re-protection actions, as applicable, specified in Paragraph 9, “List of Tasks,” of the applicable Manual, at intervals not to exceed the compliance time specified in the “Interval” column in the applicable table in Paragraph 9, “List of Tasks,” of the applicable Manual. The times in the “Interval” column are in flight hours unless there is an “M” adjacent to the number. If there is an “M” adjacent to the number, the time is in months. If there are two different numbers for a task, the number with a “T” adjacent to it is the threshold and the number with an “R” adjacent to it is the repetitive interval. (i) After accomplishment of each initial CPCP task required by paragraph (g) of this AD, the FAA may approve the incorporation into the operator's approved maintenance/inspection program of either the CPCP specified in the applicable Manual and this AD, or an equivalent program that is approved by the FAA. In all cases, the initial CPCP task for each airplane area must be completed at the compliance time specified in paragraph (g) of this AD. For the purposes of this paragraph, the FAA is defined as the cognizant Flight Standards District Office. (1) Any operator complying with paragraph (i) of this AD may use an alternative recordkeeping method to that otherwise required by section 91.417 (“Maintenance records”) or section 121.380 (“Maintenance recording requirements”) of the Federal Aviation Regulations (14 CFR 91.417 or 14 CFR 121.380, respectively) for the actions required by this AD, provided that the recordkeeping method is approved by the FAA and is included in a revision to the FAA-approved maintenance/inspection program. For the purposes of this paragraph, the FAA is defined as the cognizant Flight Standards District Office. (2) After the initial accomplishment of the tasks required by paragraph (g) of this AD, any extension of the repetitive intervals specified in the applicable Manual must be approved by the FAA. For the purposes of this paragraph, the FAA is defined as the Manager, New York Aircraft Certification Office (ACO), FAA. Corrective Actions (j) If any corrosion is found during accomplishment of any action required by paragraph (g) or (h) of this AD: Before further flight, rework, repair, or replace, as applicable, all subject parts, in accordance with Paragraph 7, “Application of the CPCP Check,” of the applicable Manual. Reporting Requirements and Repetitive Actions for Remainder of Affected Fleet (k) If any Level 3 corrosion, as defined in the Introduction of the applicable Manual, is found during accomplishment of any action required by this AD: Do paragraphs (k)(1), (k)(2), and (k)(3) of this AD. Under the provisions of the Paperwork Reduction Act (44 U.S.C. 3501 et seq. ), the Office of Management and Budget (OMB) has approved the information collection requirements contained in this AD, and assigned OMB Control Number 2120-0056. (1) Within 3 days after the finding of Level 3 corrosion, report findings to Bombardier in accordance with paragraph 7.J. of the applicable Manual. (2) Within 10 days after the finding of Level 3 corrosion, either submit a plan to the FAA to identify a schedule for accomplishing the applicable CPCP task on the remainder of the airplanes in the operator's fleet that are subject to this AD, or provide data substantiating that the Level 3 corrosion that was found is an isolated case. The FAA may impose a schedule other than proposed in the plan upon finding that a change to the schedule is needed to ensure that any other Level 3 corrosion is detected in a timely manner. For the purposes of this paragraph, the FAA is defined as the cognizant Principal Maintenance Inspector (PMI) for operators that are assigned a PMI (e.g., part 121, 125, and 135 operators), and the cognizant Flight Standards District Office for other operators (e.g., part 91 operators). (3) Within the time schedule approved in accordance with paragraph (k)(2) of this AD, accomplish the applicable task on the remainder of the airplanes in the operator's fleet that are subject to this AD. Limiting Future Corrosion Findings (l) If corrosion findings that exceed Level 1 are found in any area during any repeat of any CPCP task after the initial accomplishment required by paragraph (g) of this AD: Within 60 days after such finding, implement a means approved by the FAA to reduce future findings of corrosion in that area to Level 1 or better. For the purposes of this paragraph, the FAA is defined as the cognizant PMI for operators that are assigned a PMI (e.g. part 121, 125, and 135 operators), and the cognizant Flight Standards District Office for other operators (e.g., part 91 operators). Scheduling Corrosion Tasks for Transferred Airplanes (m) Before any airplane subject to this AD is transferred and placed into service by an operator: Establish a schedule for accomplishing the CPCP tasks required by this AD in accordance with paragraph (m)(1) or (m)(2) of this AD, as applicable. (1) For airplanes on which the CPCP tasks required by this AD have been accomplished previously at the schedule established by this AD: Perform the first CPCP task in each area in accordance with the previous operator's schedule, or in accordance with the new operator's schedule, whichever results in an earlier accomplishment of that CPCP task. After the initial accomplishment of each CPCP task in each area as required by this paragraph, repeat each CPCP task in accordance with the new operator's schedule. (2) For airplanes on which the CPCP tasks required by this AD have not been accomplished previously, or have not been accomplished at the schedule established by this AD: The new operator must perform each initial CPCP task in each area before further flight or in accordance with a schedule approved by the FAA. For the purposes of this paragraph, the FAA is defined as the cognizant PMI for operators that are assigned a PMI (e.g., part 121, 125, and 135 operators), and the cognizant Flight Standards District Office for other operators (e.g., part 91 operators). Alternative Methods of Compliance (AMOCs) (n)(1) The Manager, New York ACO, has the authority to approve AMOCs for this AD, if requested using the procedures found in 14 CFR 39.19. (2) Before using any AMOC approved in accordance with 14 CFR 39.19 on any airplane to which the AMOC applies, notify the appropriate principal inspector in the FAA Flight Standards Certificate Holding District Office. Related Information (o) Canadian airworthiness directive CF-2005-06, dated March 10, 2005, also addresses the subject of this AD. Material Incorporated by Reference (p) You must use the applicable service information specified in Table 1 of this AD to perform the actions that are required by this AD, unless the AD specifies otherwise. Table 1.—Material Incorporated by Reference Service information Date Bombardier Challenger 600 Time Limits/Maintenance July 28, 2004. Checks (CPCP) Supplement, PSP 605 (CPCP) Bombardier Challenger 601 Time Limits/Maintenance July 28, 2004. Checks (CPCP) Supplement, PSP 601-5 (CPCP) Bombardier Challenger 601 Time Limits/Maintenance July 28, 2004. Checks (CPCP) Supplement, PSP 601A-5 (CPCP) The Director of the Federal Register approved the incorporation by reference of these documents in accordance with 5 U.S.C. 552(a) and 1 CFR part 51. Contact Bombardier, Inc., Canadair, Aerospace Group, P.O. Box 6087, Station Centre-ville, Montreal, Quebec H3C 3G9, Canada, for a copy of this service information. You may review copies at the Docket Management Facility, U.S. Department of Transportation, 400 Seventh Street, SW., Room PL-401, Nassif Building, Washington, DC; on the Internet at http://dms.dot.gov ; or at the National Archives and Records Administration (NARA). For information on the availability of this material at the NARA, call (202) 741-6030, or go to http://www.archives.gov/federal_register/code_of_federal_regulations/ibr_locations.html. Issued in Renton, Washington, on December 7, 2006. Michael J. Kaszycki, Acting Manager, Transport Airplane Directorate, Aircraft Certification Service. [FR Doc. E6-21268 Filed 12-14-06; 8:45 am] BILLING CODE 4910-13-P

This AD results from the determination that, as airplanes age, they are more likely to exhibit indications of corrosion. We are issuing this AD to prevent structural failure of the airplane due to corrosion.