AD 2007-25-01 Airworthiness Directives; Aircraft Industries, a.s. (Type Certificate No. G24EU Formerly Held by LETECKÉ ZÁVODY a.s. and LET Aeronautical Works) Model L-13 Blanik Gliders

This AD applies to Model L-13 Blanik gliders, all serial numbers, certificated in any category.

Unless already done, do the following actions: (1) Within the next 3 months after January 7, 2008 (the effective date of this AD) and repetitively thereafter at intervals not to exceed 12 months, inspect the control bridge for cracks. Follow the procedures in LET Aircraft Industries, a.s. Mandatory Bulletin MB No.: L13 / 105a, dated May 22, 2007, except use a 10X magnifier and do a dye penetrant inspection following the procedures in chapter 5, section 5, of FAA Advisory Circular AC 43.13-1B CHG 1, dated September 27, 2001. (2) If cracks are found during any inspection in paragraph (f)(1) of this AD, before further flight, install a new control bridge Dwg. No. (part number (P/N)) A740 370 N or Dwg. No. (P/N) A401 001N following the procedures in LET Aircraft Industries, a.s. Mandatory Bulletin MB No.: L13 / 105a, dated May 22, 2007. FAA AD Differences Note: This AD differs from the MCAI and/or service information as follows: (1) The service information requires a visual inspection with a 6X magnifier. We are requiring a dye penetrant inspection and a 10X magnifier to detect cracks that could go undetected using only a 6X magnifier. (2) The MCAI requires updating the maintenance manuals to add “type A based” repetitive inspections of the control bridge. Since the maintenance manual is only one way of establishing a maintenance program, the only way we can mandate these repetitive inspections is through an AD action. Other FAA AD Provisions (g) The following provisions also apply to this AD: (1) Alternative Methods of Compliance (AMOCs): The Manager, Standards Office, 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: Greg Davison, Glider Program Manager, FAA, Small Airplane Directorate, 901 Locust, Room 301, Kansas City, Missouri 64106; telephone: (816) 329-4130; fax: (816) 329-4090. 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 (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 European Aviation Safety Agency (EASA) AD No. 2007-0212, dated August 7, 2007; and LET Aircraft Industries, a.s. Mandatory Bulletin MB No.: L13 / 105a, dated May 22, 2007, for related information. Material Incorporated by Reference (i) You must use LET Aircraft Industries, a.s. Mandatory Bulletin MB No.: L13 / 105a, dated May 22, 2007, 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 this service information under 5 U.S.C. 552(a) and 1 CFR part 51. (2) For service information identified in this AD, contact Aircraft Industries, a.s., Na Záhonech 1177, 686 04 Kunovice, Czech Republic; phone: +420 572 817 660; fax: +420 572 816 112; e-mail: ots@let.cz. (3) You may review copies at the FAA, Central Region, Office of the Regional Counsel, 901 Locust, Room 506, Kansas City, Missouri 64106; 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 Kansas City, Missouri, on November 23, 2007. Steven W. Thompson, Acting Manager, Small Airplane Directorate, Aircraft Certification Service. [FR Doc. E7-23222 Filed 11-30-07; 8:45 am] BILLING CODE 4910-13-P

Unless already done, do the following actions: (1) Within the next 3 months after January 7, 2008 (the effective date of this AD) and repetitively thereafter at intervals not to exceed 12 months, inspect the control bridge for cracks. Follow the procedures in LET Aircraft Industries, a.s. Mandatory Bulletin MB No.: L13 / 105a, dated May 22, 2007, except use a 10X magnifier and do a dye penetrant inspection following the procedures in chapter 5, section 5, of FAA Advisory Circular AC 43.13-1B CHG 1, dated September 27, 2001. (2) If cracks are found during any inspection in paragraph (f)(1) of this AD, before further flight, install a new control bridge Dwg. No. (part number (P/N)) A740 370 N or Dwg. No. (P/N) A401 001N following the procedures in LET Aircraft Industries, a.s. Mandatory Bulletin MB No.: L13 / 105a, dated May 22, 2007. FAA AD Differences Note: This AD differs from the MCAI and/or service information as follows: (1) The service information requires a visual inspection with a 6X magnifier. We are requiring a dye penetrant inspection and a 10X magnifier to detect cracks that could go undetected using only a 6X magnifier. (2) The MCAI requires updating the maintenance manuals to add “type A based” repetitive inspections of the control bridge. Since the maintenance manual is only one way of establishing a maintenance program, the only way we can mandate these repetitive inspections is through an AD action. Other FAA AD Provisions (g) The following provisions also apply to this AD: (1) Alternative Methods of Compliance (AMOCs): The Manager, Standards Office, 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: Greg Davison, Glider Program Manager, FAA, Small Airplane Directorate, 901 Locust, Room 301, Kansas City, Missouri 64106; telephone: (816) 329-4130; fax: (816) 329-4090. 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 (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 European Aviation Safety Agency (EASA) AD No. 2007-0212, dated August 7, 2007; and LET Aircraft Industries, a.s. Mandatory Bulletin MB No.: L13 / 105a, dated May 22, 2007, for related information. Material Incorporated by Reference (i) You must use LET Aircraft Industries, a.s. Mandatory Bulletin MB No.: L13 / 105a, dated May 22, 2007, 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 this service information under 5 U.S.C. 552(a) and 1 CFR part 51. (2) For service information identified in this AD, contact Aircraft Industries, a.s., Na Záhonech 1177, 686 04 Kunovice, Czech Republic; phone: +420 572 817 660; fax: +420 572 816 112; e-mail: ots@let.cz. (3) You may review copies at the FAA, Central Region, Office of the Regional Counsel, 901 Locust, Room 506, Kansas City, Missouri 64106; 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 Kansas City, Missouri, on November 23, 2007. Steven W. Thompson, Acting Manager, Small Airplane Directorate, Aircraft Certification Service. [FR Doc. E7-23222 Filed 11-30-07; 8:45 am] BILLING CODE 4910-13-P