AD 2008-17-19 Airworthiness Directives; ATR Model ATR42-200, -300, and -320 Airplanes

Models named: ATR42-200, -300, -320. Read the applicability below — it usually turns on serial or part numbers too.

This AD applies to ATR Model ATR42-200, -300, and -320 airplanes, certificated in any category; excluding airplanes on which ATR Modification 8463 has been done.

For MLG side brace assemblies with part number (P/N) D22710000, without suffix “-9”: Unless already done, do the following actions. (1) For airplanes on which the MLG side brace assemblies have not been inspected as of the effective date of this AD, in accordance with the Accomplishment Instructions of Messier-Dowty Service Bulletin 631-32-191, Revision 1, dated February 26, 2007: Perform the initial eddy current inspection for cracking of the MLG side brace, in accordance with the Accomplishment Instructions of Messier-Dowty Special Inspection Service Bulletin 631-32-191, Revision 2, dated August 30, 2007, at the applicable time specified in Table 1 of this AD. Unless otherwise specified, the flight cycles and times indicated in Table 1 of this AD must be interpreted as total flight cycles since overhaul, or time since overhaul, and as total flight cycles since new or time since manufacture for side brace assemblies that have not undergone any overhaul yet. Table 1—Compliance Times For a MLG side brace assembly with the total flight cycles since new or total flight cycles since overhaul specified below as of the effective date of this AD— Do the initial inspection at the time specified below— More than 8,000 flight cycles Within 500 flight cycles after the effective date of this AD. 5,000 or more total flight cycles, but not more than 8,000 total flight cycles Within 1,000 flight cycles after the effective date of this AD or before accumulating 8,500 flight cycles, whichever occurs first. Less than 5,000 flight cycles Within 2,000 flight cycles after the effective date of this AD or before accumulating 6,000 flight cycles, whichever occurs first. (2) For airplanes on which the MLG side brace assemblies have been inspected as of the effective date of this AD, in accordance with the Accomplishment Instructions of Messier-Dowty Service Bulletin 631-32-191, Revision 1, dated February 26, 2007: Within 1,000 flight cycles after the last inspection or within 200 flight cycles after the effective date of this AD, whichever occurs later, perform an eddy current inspection for cracking of the MLG side brace, in accordance with the Accomplishment Instructions of Messier-Dowty Special Inspection Service Bulletin 631-32-191, Revision 2, dated August 30, 2007. (3) After accomplishment of the inspection required by paragraph (f)(1) or (f)(2) of this AD, repeat the inspection at intervals not to exceed 2,600 flight cycles in accordance with the Accomplishment Instructions of Messier-Dowty Special Inspection Service Bulletin 631-32-191, Revision 2, dated August 30, 2007. (4) If any crack is found during any inspection required by paragraphs (f)(1), (f)(2) and (f)(3) of this AD, before further flight, replace the affected side brace in accordance with the Accomplishment Instructions of Messier-Dowty Special Inspection Service Bulletin 631-32-191, Revision 2, dated August 30, 2007. (5) At the applicable time specified in paragraph (f)(5)(i) or (f)(5)(ii) of this AD: Inspect for cracking, corrosion, and defects of the MLG side brace assemblies with P/N D22710000, without suffix “-9”, in accordance with the Accomplishment Instructions of Messier-Dowty Service Bulletin 631-32-194, dated June 6, 2007. (i) For airplanes having side brace assemblies on which Messier-Bugatti Service Bulletin 631-32-072 has not been incorporated: Before accumulating 16,000 total flight cycles or within 8 years after the effective date of this AD, whichever occurs first. (ii) For airplanes having side brace assemblies on which Messier-Bugatti Service Bulletin 631-32-072 has been incorporated: Before accumulating 19,000 total flight cycles or within 8 years after the effective date of this AD, whichever occurs first. (6) If no cracking, corrosion, or defect is found during any inspection required by paragraph (f)(5) of this AD, before further flight, modify and re-identify (by adding a suffix “-9” to P/N D22710000) the MLG side brace assemblies in accordance with the Accomplishment Instructions of ATR Service Bulletin ATR42-32-0092, dated June 25, 2007. (7) If any cracking, corrosion, or defect is found during any inspection required by paragraph (f)(5) of this AD, before further flight, replace the discrepant MLG side brace assembly with a modified and re-identified MLG side brace assembly in accordance with the Accomplishment Instructions of ATR Service Bulletin ATR42-32-0092, dated June 25, 2007. FAA AD Differences Note: This AD differs from the MCAI and/or service information as follows: Although the MCAI or service information allows further flight if a crack is found during compliance with the required inspections, this AD requires that you repair the crack before further flight. Other FAA AD Provisions (g) The following provisions also apply to this AD: (1) Alternative Methods of Compliance (AMOCs): The Manager, International Branch, ANM-116, Transport Airplane Directorate, 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: Tom Rodriguez, Aerospace Engineer, International Branch, ANM-116, Transport Airplane Directorate, FAA, 1601 Lind Avenue, SW., Renton, Washington 98057-3356; telephone (425) 227-1137; fax (425) 227-1149. Before using any approved AMOC on any airplane to which the AMOC applies, notify your appropriate principal inspector (PI) in the FAA Flight Standards District Office (FSDO), or lacking a PI, your local FSDO. (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, 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 EASA Airworthiness Directive 2007-0263, dated October 3, 2007, and the service information specified in Table 2 of this AD, for related information. Table 2—Service Information Service Bulletin Revision Date ATR Service Bulletin ATR42-32-0092 Original June 25, 2007. ATR Technical Instruction ATR42, ATR42-07-01 Original February 5, 2007. Messier-Dowty Service Bulletin 631-32-194 Original June 6, 2007. Messier-Dowty Special Inspection Service Bulletin 631-32-191 2 August 30, 2007. Material Incorporated by Reference (i) You must use the service information specified in Table 3 of this AD to do the actions required by this AD, unless the AD specifies otherwise. Table 3—Material Incorporated by Reference Service Bulletin Revision Date ATR Service Bulletin ATR42-32-0092 Original June 25, 2007. Messier-Dowty Service Bulletin 631-32-194 Original June 6, 2007. Messier-Dowty Special Inspection Service Bulletin 631-32-191 2 August 30, 2007. Messier-Dowty Special Inspection Service Bulletin 631-32-191, Revision 2, dated August 30, 2007, contains the following effective pages:   Page No. Revision level shown on page Date shown on page 1, 3, 8 2 August 30, 2007. 2, 6, 7, 9, 10 1 February 26, 2007. 4, 5 Original December 13, 2006. (1) The Director of the Federal Register approved the incorporation by reference of this service information under 5 U.S.C. 552(a) and 1 CFR part 51. (2) For service information identified in this AD, contact ATR, 316 Route de Bayonne, 31060 Toulouse, Cedex 03, France. (3) You may review copies at the FAA, Transport Airplane Directorate, 1601 Lind Avenue SW., Renton, Washington; or 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/cfr/ibr-locations.html . Issued in Renton, Washington, on August 12, 2008. Michael Kaszycki, Acting Manager, Transport Airplane Directorate, Aircraft Certification Service. [FR Doc. E8-19365 Filed 9-26-08; 8:45 am] BILLING CODE 4910-13-P

For MLG side brace assemblies with part number (P/N) D22710000, without suffix “-9”: Unless already done, do the following actions. (1) For airplanes on which the MLG side brace assemblies have not been inspected as of the effective date of this AD, in accordance with the Accomplishment Instructions of Messier-Dowty Service Bulletin 631-32-191, Revision 1, dated February 26, 2007: Perform the initial eddy current inspection for cracking of the MLG side brace, in accordance with the Accomplishment Instructions of Messier-Dowty Special Inspection Service Bulletin 631-32-191, Revision 2, dated August 30, 2007, at the applicable time specified in Table 1 of this AD. Unless otherwise specified, the flight cycles and times indicated in Table 1 of this AD must be interpreted as total flight cycles since overhaul, or time since overhaul, and as total flight cycles since new or time since manufacture for side brace assemblies that have not undergone any overhaul yet. Table 1—Compliance Times For a MLG side brace assembly with the total flight cycles since new or total flight cycles since overhaul specified below as of the effective date of this AD— Do the initial inspection at the time specified below— More than 8,000 flight cycles Within 500 flight cycles after the effective date of this AD. 5,000 or more total flight cycles, but not more than 8,000 total flight cycles Within 1,000 flight cycles after the effective date of this AD or before accumulating 8,500 flight cycles, whichever occurs first. Less than 5,000 flight cycles Within 2,000 flight cycles after the effective date of this AD or before accumulating 6,000 flight cycles, whichever occurs first. (2) For airplanes on which the MLG side brace assemblies have been inspected as of the effective date of this AD, in accordance with the Accomplishment Instructions of Messier-Dowty Service Bulletin 631-32-191, Revision 1, dated February 26, 2007: Within 1,000 flight cycles after the last inspection or within 200 flight cycles after the effective date of this AD, whichever occurs later, perform an eddy current inspection for cracking of the MLG side brace, in accordance with the Accomplishment Instructions of Messier-Dowty Special Inspection Service Bulletin 631-32-191, Revision 2, dated August 30, 2007. (3) After accomplishment of the inspection required by paragraph (f)(1) or (f)(2) of this AD, repeat the inspection at intervals not to exceed 2,600 flight cycles in accordance with the Accomplishment Instructions of Messier-Dowty Special Inspection Service Bulletin 631-32-191, Revision 2, dated August 30, 2007. (4) If any crack is found during any inspection required by paragraphs (f)(1), (f)(2) and (f)(3) of this AD, before further flight, replace the affected side brace in accordance with the Accomplishment Instructions of Messier-Dowty Special Inspection Service Bulletin 631-32-191, Revision 2, dated August 30, 2007. (5) At the applicable time specified in paragraph (f)(5)(i) or (f)(5)(ii) of this AD: Inspect for cracking, corrosion, and defects of the MLG side brace assemblies with P/N D22710000, without suffix “-9”, in accordance with the Accomplishment Instructions of Messier-Dowty Service Bulletin 631-32-194, dated June 6, 2007. (i) For airplanes having side brace assemblies on which Messier-Bugatti Service Bulletin 631-32-072 has not been incorporated: Before accumulating 16,000 total flight cycles or within 8 years after the effective date of this AD, whichever occurs first. (ii) For airplanes having side brace assemblies on which Messier-Bugatti Service Bulletin 631-32-072 has been incorporated: Before accumulating 19,000 total flight cycles or within 8 years after the effective date of this AD, whichever occurs first. (6) If no cracking, corrosion, or defect is found during any inspection required by paragraph (f)(5) of this AD, before further flight, modify and re-identify (by adding a suffix “-9” to P/N D22710000) the MLG side brace assemblies in accordance with the Accomplishment Instructions of ATR Service Bulletin ATR42-32-0092, dated June 25, 2007. (7) If any cracking, corrosion, or defect is found during any inspection required by paragraph (f)(5) of this AD, before further flight, replace the discrepant MLG side brace assembly with a modified and re-identified MLG side brace assembly in accordance with the Accomplishment Instructions of ATR Service Bulletin ATR42-32-0092, dated June 25, 2007. FAA AD Differences Note: This AD differs from the MCAI and/or service information as follows: Although the MCAI or service information allows further flight if a crack is found during compliance with the required inspections, this AD requires that you repair the crack before further flight. Other FAA AD Provisions (g) The following provisions also apply to this AD: (1) Alternative Methods of Compliance (AMOCs): The Manager, International Branch, ANM-116, Transport Airplane Directorate, 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: Tom Rodriguez, Aerospace Engineer, International Branch, ANM-116, Transport Airplane Directorate, FAA, 1601 Lind Avenue, SW., Renton, Washington 98057-3356; telephone (425) 227-1137; fax (425) 227-1149. Before using any approved AMOC on any airplane to which the AMOC applies, notify your appropriate principal inspector (PI) in the FAA Flight Standards District Office (FSDO), or lacking a PI, your local FSDO. (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, 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 EASA Airworthiness Directive 2007-0263, dated October 3, 2007, and the service information specified in Table 2 of this AD, for related information. Table 2—Service Information Service Bulletin Revision Date ATR Service Bulletin ATR42-32-0092 Original June 25, 2007. ATR Technical Instruction ATR42, ATR42-07-01 Original February 5, 2007. Messier-Dowty Service Bulletin 631-32-194 Original June 6, 2007. Messier-Dowty Special Inspection Service Bulletin 631-32-191 2 August 30, 2007. Material Incorporated by Reference (i) You must use the service information specified in Table 3 of this AD to do the actions required by this AD, unless the AD specifies otherwise. Table 3—Material Incorporated by Reference Service Bulletin Revision Date ATR Service Bulletin ATR42-32-0092 Original June 25, 2007. Messier-Dowty Service Bulletin 631-32-194 Original June 6, 2007. Messier-Dowty Special Inspection Service Bulletin 631-32-191 2 August 30, 2007. Messier-Dowty Special Inspection Service Bulletin 631-32-191, Revision 2, dated August 30, 2007, contains the following effective pages:   Page No. Revision level shown on page Date shown on page 1, 3, 8 2 August 30, 2007. 2, 6, 7, 9, 10 1 February 26, 2007. 4, 5 Original December 13, 2006. (1) The Director of the Federal Register approved the incorporation by reference of this service information under 5 U.S.C. 552(a) and 1 CFR part 51. (2) For service information identified in this AD, contact ATR, 316 Route de Bayonne, 31060 Toulouse, Cedex 03, France. (3) You may review copies at the FAA, Transport Airplane Directorate, 1601 Lind Avenue SW., Renton, Washington; or 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/cfr/ibr-locations.html . Issued in Renton, Washington, on August 12, 2008. Michael Kaszycki, Acting Manager, Transport Airplane Directorate, Aircraft Certification Service. [FR Doc. E8-19365 Filed 9-26-08; 8:45 am] BILLING CODE 4910-13-P