Summary
This document proposes to revise an earlier proposed airworthiness directive (AD) that would apply to all LET a.s. (formerly LET n.p.) (LET) Model Blanik L-13 AC sailplanes. The earlier NPRM would have required you to repetitively inspect the bedding of the front and rear control levers for cracks, and, if any cracks are found, replace with parts found free of cracks. The earlier NPRM resulted from mandatory continuing airworthiness information (MCAI) issued by the airworthiness authority for the Czech Republic. The MCAI is a report of one occurrence of cracks in the attachment of control levers on the control bridge. Since FAA issued the NPRM, FAA has received and evaluated new service information that eliminates the repetitive inspection, requires replacement of parts, and changes the serial number effectivity. Since these actions impose an additional burden over that proposed in the NPRM, we are reopening the comment period to allow the public the chance to comment on theseadditional actions.