Airworthiness Directive · Amendment 39-21189 · Rudder control system
Blanik Aircraft CZ s.r.o.
This AD applies to Blanik Aircraft CZ s.r.o. Model L 23 Super-Blanik gliders, all serial numbers, certificated in any category.
The FAA is adopting a new airworthiness directive (AD) for all Blanik Aircraft CZ s.r.o. Model L 23 Super-Blanik gliders. This AD requires a one-time inspection of the rudder control cable attachment screws and hinge bolts, replacement of the cable attachment screws and hinge bolts if a crack is found, and reporting the inspection results to the manufacturer. This AD was prompted by reports of cracked rudder cable attachment screws. The FAA is issuing this AD to address the unsafe condition on these products.
(1) For purposes of this AD, an affected part means a part identified in table 1 to paragraph (g)(1) of this AD. The series refers to the second pair of digits in the glider serial number.
(2) Before further flight after August 28, 2020 (the effective date of this AD), inspect each affected part in accordance with the Working Procedure, paragraphs A.1(1) through A.1(4) or paragraphs A.2(1) through A.2(4), as applicable for each part, of Blanik Mandatory Bulletin Document No. L23/060a, Revision 2, dated March 17, 2020.
(3) If there are no cracks in the inspection area of a part during the inspection required by paragraph (g)(2) of this AD, before further flight, install the rudder in accordance with the Working Procedure, paragraph A.1(8) or A.2(8), as applicable for each part, of Blanik Mandatory Bulletin Document No. L23/060a, Revision 2, dated March 17, 2020.
(4) If there are any cracks in the inspection area of a part during the inspection required by paragraph (g)(2) of this AD, before further flight, replace the part in accordance with the Working Procedure, paragraphs A.1, A.2, either A.3.1. or A.3.2 (as applicable), and A.4, of Blanik Information Bulletin Document No. L23/061b, Revision 1, dated March 17, 2020, and install the rudder in accordance with the Working Procedure, paragraph A.1(8) or A.2(8), as applicable for each part, of Blanik Mandatory Bulletin Document No. L23/060a, Revision 2, dated March 17, 2020.
Within 10 days after each inspection required by paragraph (g)(1) of this AD, report the following information to Blanik Aircraft CZ s.r.o. at the address provided in paragraph (m)(3) of this AD.
(1) Glider registration number (N number).
(2) Glider serial number.
(3) Glider total hours time-in-service.
(4) Number of starts by winch and tow (if known).
(5) Inspection results (including no findings).
