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(e) The mandatory continuing airworthiness information (MCAI) states: Cracks were reported on the rear horizontal stabilizer bracket of two L 23 SUPER– BLANIK sailplanes. This condition, if not corrected, could result in no longer retaining the horizontal stabilizer in place and consequent loss of control of the aeroplane. For the reasons described above, this AD requires immediate inspection of the bracket located at the top of the fin (drawing No. A 730 420 N) and its replacement depending on findings. As a result of the on-going investigation further mandatory terminating action and/or repetitive inspection is likely to follow. Actions and Compliance (f) Unless already done, do the following actions: (1) Before further flight after the effective date of this AD, inspect the rear horizontal stabilizer bracket critical areas (hinge welding areas) for cracks following LET Aircraft Industries Mandatory Bulletin No.: L23/053a, dated December 14, 2010. (2) If during the inspection required in paragraph (f)(1) of this AD a crack is found, before further flight, replace the bracke

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Year: 2011
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