2010-21-11: Landing gear

2010-21-11 Bombardier, Inc.: Amendment 39-16471. Docket No. FAA- 2009-1229; Directorate Identifier 2009-NM-106-AD. Effective Date (a) This airworthiness directive (AD) becomes effective November 18, 2010. Affected ADs (b) None. Applicability (c) This AD applies to Bombardier, Inc. Model CL-600-2B19 (Regional Jet Series 100 & 440) airplanes, serial numbers 7003 and subsequent; certificated in any category. Subject (d) Air Transport Association (ATA) of America Code 32: Landing Gear. Reason (e) The mandatory continuing airworthiness information (MCAI) states: A specific batch of nose landing gear (NLG) and NLG door selector valves, part number (P/N) 601R75146-1 (Kaiser Fluid Technologies P/N 750006000), may have had their end caps incorrectly lock-wired and/or incorrectly torqued during assembly. This condition can lead to the end cap backing off, with consequent damage to a seal and internal leakage within the valve. Subsequently, if electrical power is transferred or removed from the aircraft before the NLG safety pin is installed, any pressure, including residual pressure, in the No. 3 hydraulic system can result in an uncommanded NLG retraction and/or uncommanded opening of the NLG doors. There have been six cases reported on CL[-]600- 2B19 aircraft, one of which resulted in the collapse of the NLG at the departure gate. This [Canadian] directive mandates [an inspection of the NLG and NLG selector valves to determine the serial number and marking of the part and] a check [to determine the torque value and correct lockwire installation] of the [affected] NLG and NLG door selector valves installed on all aircraft in the Applicability section * * *. Depending on the results, replacement, rework and/or additional identification of the valves may be required. Actions and Compliance (f) Unless already done, do the following actions. (1) Within 1,600 flight hours or 18 months after the effective date of this AD, whichever occurs first: Do an inspection to determine the serial number and identification markings on the selector valve of the NLG and the door selector valve of the NLG, in accordance with the Accomplishment Instructions of Bombardier Service Bulletin 601R-32-104, dated March 3, 2009. A review of airplane maintenance records is acceptable in lieu of this inspection if the serial number and identification markings of the selector valve and the door selector valve can be conclusively determined from that review. (2) For any airplane having either the selector valve of the NLG or the door selector valve of the NLG that have a serial number outside the range 0001 through 2126 inclusive, suffix "T'' identification, or "SB750006000-1'' marking, no further action is required for that valve. (3) If, during any inspection required by paragraph (f)(1) of this AD, any selector valve of the NLG or any door selector valve of the NLG is found that does not have any serial number or identification marking specified in paragraph (f)(2) of this AD: Before further flight after doing the inspection required by paragraph (f)(1) of this AD, inspect to determine the torque value and correct lockwire installation of the valve, and modify (replace, rework, or re-identify) the valve, as applicable, in accordance with the Accomplishment Instructions of Bombardier Service Bulletin 601R- 32-104, dated March 3, 2009. (4) For airplanes having part number (P/N) 601R75146-1 (Tactair P/N 750006000), serial number 001 thru 0767: Modification of the valve accomplished before the effective date of this AD in accordance with Bombardier Service Bulletin 601R-32-090, Revision B, dated December 12, 2006; and Bombardier Service Bulletin Revision C, dated March 3, 2009; are considered acceptable for compliance with the requirements of this AD for that valve. FAA AD Differences Note 1: This AD differs from the MCAI and/or service information as follows: No differences. Other FAA AD Provisions (g) The following provisions also apply to this AD: (1) Alternative Methods of Compliance (AMOCs): The Manager, New York Aircraft Certification Office (ACO), ANE-170, FAA, has the authority to approve AMOCs for this AD, if requested using the procedures found in 14 CFR 39.19. Send information to ATTN: Program Manager, Continuing Operational Safety, FAA, New York ACO, 1600 Stewart Avenue, Suite 410, Westbury, New York 11590; telephone (516) 228-7300; fax (516) 794-5531. Before using any approved AMOC on any airplane to which the AMOC applies, notify your principal maintenance inspector (PMI) or principal avionics inspector (PAI), as appropriate, or lacking a principal inspector, your local Flight Standards District Office. The AMOC approval letter must specifically reference this AD. (2) Airworthy Product: For any requirement in this AD to obtain corrective actions from a manufacturer or other source, use these actions if they are FAA-approved. Corrective actions are considered FAA-approved if they are approved by the State of Design Authority (or their delegated agent). You are required to assure the product is airworthy before it is returned to service. (3) Reporting Requirements: For any reporting requirement in 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 and has assigned OMB Control Number 2120-0056. Related Information (h) Refer to MCAI Canadian Airworthiness Directive CF-2009-19, dated April 29, 2009; and Bombardier Service Bulletin 601R-32-104, dated March 3, 2009; for related information. Material Incorporated by Reference (i) You must use Bombardier Service Bulletin 601R-32-104, dated March 3, 2009, to do the actions required by this AD, unless the AD specifies otherwise. (1) The Director of the Federal Register approved the incorporation by reference of the service information under 5 U.S.C. 552(a) and 1 CFR part 51. (2) For service information identified in this AD, contact Bombardier, Inc., 400 C te-Vertu Road West, Dorval, Qu bec H4S 1Y9, Canada; telephone 514-855-5000; fax 514-855- 7401; e-mail [email protected]; Internet http:// www.bombardier.com. (3) You may review copies of the service information at the FAA, Transport Airplane Directorate, 1601 Lind Avenue, SW., Renton, Washington. For information on the availability of this material at the FAA, call 425-227-1221. (4) You may also review copies of the service information that is incorporated by reference at the National Archives and Records Administration (NARA). For information on the availability of this material at NARA, call 202-741-6030, or go to: http:// www.archives.gov/federal_register/code_of_federal_regulations/ ibr_locations.html.