Airworthiness Directive · Amendment 39-18540 · Flight controls
BLANIK LIMITED Gliders
This AD applies to BLANIK LIMITED Models L-13 Blanik and L-13 AC Blanik gliders (type certificate previously held by LET Aeronautical Works), all serial numbers, certificated in any category.
We are superseding airworthiness directive (AD) 99-19-33 for BLANIK LIMITED Models L-13 Blanik and L-13 AC Blanik gliders (type certificate previously held by LET Aeronautical Works). This AD results from mandatory continuing airworthiness information (MCAI) issued by an aviation authority of another country to identify and correct an unsafe condition on an aviation product. The MCAI describes the unsafe condition as lack of distinct color marking of the elevator drive. We are issuing this AD to require actions to address the unsafe condition on these products.
Unless already done, do the following actions in paragraphs (f)(1) and (f)(2) of this AD, including all subparagraphs:
(1) Model L-13 Blanik gliders:
(i) Within the next 3 calendar months after November 8, 1999 (the effective date retained from AD 99-19-33), paint the elevator drive mechanism using a contrasting color (such as red) following the procedures in LET Mandatory Bulletin MB No.: L13/082a, dated December 10, 1998.
(ii) As of November 8, 1999 (the effective date retained from AD 99-19-33), only install an elevator bellcrank that has been painted as specified in paragraph (f)(1)(i) of this AD and that has been properly oriented to make sure it is not being installed backward.
(2) Model L-13 AC Blanik gliders:
(i) Within the next 3 calendar months after July 14, 2016 (the effective date of this AD), paint the elevator drive mechanism using a contrasting color (such as red) following the procedures in LET Mandatory Bulletin MB No.: L13/082a, dated December 10, 1998.
(ii) As of July 14, 2016 (the effective date of this AD), only install an elevator bellcrank that has been painted as specified in paragraph (f)(2)(i) of this AD and that has been properly oriented to make sure it is not being installed backward.
