Airworthiness directives › 99-19-33
AD 99-19-33 Airworthiness Directives; LET Aeronautical Works Model L-13 ``Blanik'' Sailplanes
Applicability*9
Model L-13 ``Blanik'' sailplanes, all serial numbers, certificated in any category. Note 1: This AD applies to each sailplane identified in the preceding applicability provision, regardless of whether it has been modified, altered, or repaired in the area subject to the requirements of this AD. For sailplanes that have been modified, altered, or repaired so that the performance of the requirements of this AD is affected, the owner/operator must request approval for an alternative method of compliance in accordance with paragraph (d) of this AD. The request should include an assessment of the effect of the modification, alteration, or repair on the unsafe condition addressed by this AD; and, if the unsafe condition has not been eliminated, the request should include specific proposed actions to address it.
Compliance
Required as indicated in the body of this AD, unless already accomplished. To prevent the elevator drive bellcrank from being installed backwards, which could result in an incorrect rigging of the elevator flight control with potential reduced or loss of control of the sailplane, accomplish the following: (a) Within the next 3 calendar months after the effective date of this AD, paint (using a contrasting color, i.e., red paint) the elevator drive mechanism to prevent the elevator drive bellcrank from being inadvertently installed backwards. Accomplish this action in accordance with the Work Procedure section, including Figure 1, of LET Mandatory Bulletin No. L13/082a, dated December 10, 1998. (b) As of the effective date of this AD, no person may install, on any affected sailplane, an elevator drive bellcrank where the following has not been accomplished: (1) The elevator bellcrank inspected to assure that it is not installed backwards; and (2) The elevator drive bellcrank painted as required by paragraph (a) of this AD. (c) Special flight permits may be issued in accordance with sections 21.197 and 21.199 of the Federal Aviation Regulations (14 CFR 21.197 and 21.199) to operate the sailplane to a location where the requirements of this AD can be accomplished. (d) An alternative method of compliance or adjustment of the compliance time that provides an equivalent level of safety may be approved by the Manager, Small Airplane Directorate, FAA, 1201 Walnut, suite 900, Kansas City, Missouri 64106. The request shall be forwarded through an appropriate FAA Maintenance Inspector, who may add comments and then send it to the Manager, Small Airplane Directorate. Note 2: Information concerning the existence of approved alternative methods of compliance with this AD, if any, may be obtained from the Small Airplane Directorate. (e) Questions or technical information related to LET Mandatory Bulletin No. L13/082a, dated December 10, 1998, should be directed to LET Aeronautical Works, Kunovice 686 04, Czech Republic; telephone: +420 632 55 44 96; facsimile: +420 632 611 26. This service information may be examined at the FAA, Central Region, Office of the Regional Counsel, Room 1558, 601 E. 12th Street, Kansas City, Missouri 64106. [[Page 50442]] (f) The modification required by this AD shall be done in accordance with LET Mandatory Bulletin No. L13/082a, dated December 10, 1998. This incorporation by reference was approved by the Director of the Federal Register in accordance with 5 U.S.C. 552(a) and 1 CFR part 51. Copies may be obtained from LET Aeronautical Works, Kunovice 686 04, Czech Republic. Copies may be inspected at the FAA, Central Region, Office of the Regional Counsel, Room 1558, 601 E. 12th Street, Kansas City, Missouri, or at the Office of the Federal Register, 800 North Capitol Street, NW, suite 700, Washington, DC. Note 3: The subject of this AD is addressed in Czech Republic AD Number: CAA-AD-4-099/98, dated December 30, 1998. (g) This amendment becomes effective on November 8, 1999. Issued in Kansas City, Missouri, on September 9, 1999. Michael K. Dahl, Acting Manager, Small Airplane Directorate, Aircraft Certification Service. [FR Doc. 99-24089 Filed 9-16-99; 8:45 am] BILLING CODE 4910-13-U
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