2006-24-11: Forward, vertical, and aft flanges

2006-24-11 Raytheon Aircraft Company (RAC): Amendment 39-14840; Docket No. FAA-2006-26258; Directorate Identifier 2006-CE-67-AD. Effective Date (a) This AD becomes effective on December 11, 2006. Affected ADs (b) AD 2006-18-51, Amendment 39-14757 (71 FR 52983, September 8, 2006), relates to the subject of this AD. However, this AD does not supersede or revise that AD. Both ADs are necessary to address the unsafe condition. Applicability (c) This AD applies to the following airplane models and serial numbers that are certificated in any category: Models Serial Numbers (1) 1900 UA-3 (2) 1900C (C-12J) UB-1 through UB-74, UC-1 through UC-174, and UD-1 through UD-6 (3) 1900D UE-1 through UE-439 Unsafe Condition (d) This AD is the result of additional fatigue cracks found in the wing rear spar lower caps on a Raytheon Model 1900 airplane shortly after complying with AD 2006-18-51. We are issuing this AD to require a more rigorous and detailed inspection to find the fatigue cracks which are the unsafe condition. Failure to detect cracking in the wing rear spar lower caps of the affected airplanes could result in a wing failure. Such a wing failure could result in the wing separating from the airplane with consequent loss of control. Compliance (e) To address this problem, you must do the following, unless already done: Actions Compliance Procedures (1) Repetitively inspect both the left and right wing rear spar lower caps for cracks and other damage such as loose or missing fasteners. Initially inspect within 100 hours time-in-service (TIS) or 30 days after December 11, 2006 (the effective date of this AD), whichever occurs first. Repetitively inspect thereafter at intervals not to exceed 200 hours TIS. Follow the procedures in Raytheon Mandatory Service Bulletin 57-3815, dated Issued: October, 2006. (2) If cracks are found repair all cracks by obtaining and incorporating an FAA-approved repair scheme from RAC. Before further flight after any inspection required by paragraph (e)(1) of this AD where cracks are found. Contact RAC at Post Office Box 85, Wichita, Kansas 67201-0085; phone: 316-676-8366; fax: (316) 676-8745; email: [email protected]. (3) Report the inspection results to Raytheon Aircraft Company using the instructions and forms in the service bulletin. Complete all sections of the required forms. Reporting requirements have been approved by the Office of Management and Budget (OMB) and assigned OMB control number 2120-0056. Report the initial inspection within 10 days after the inspection or 10 days after the effective date of this AD, whichever occurs later. Report the repetitive inspections within 30 days after the inspection. Follow the procedures in Raytheon Mandatory Service Bulletin 57-3815, dated Issued: October, 2006. Alternative Methods of Compliance (AMOCs) (f) The Manager, Wichita Aircraft Certification Office, FAA, ATTN: Steven E. Potter,FAA, 1801 Airport Road, Wichita, Kansas 67209; telephone: (316) 946-4124; fax: (316) 946-4107, has the authority to approve AMOCs for this AD, if requested using the procedures in 14 CFR 39. Material Incorporated by Reference (g) You must use Raytheon Mandatory Service Bulletin 57-3815, Issued: October, 2006, 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 Raytheon Aircraft Company (RAC), Post Office Box 85, Wichita, Kansas 67201-0085, Phone 1-800-429-5372 or 1-316-676-2000, Fax: 1-316-676- 8745. (3) You may review copies at the FAA, Central Region, Office of the Regional Counsel, 901 Locust, 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/code_of_federal_regulations/ibr_locations.html .