Airworthiness Directive · Amendment 39-16581 · Stabilizers
Aircraft Industries a.s. Model L 23 Super Blanik Sailplanes
This AD applies to Aircraft Industries a.s. Model L 23 Super Blanik sailplanes, all serial numbers, certificated in any category.
We are adopting a new airworthiness directive (AD) for the products listed above. This AD results from mandatory continuing airworthiness information (MCAI) issued by the aviation authority of another country to identify and correct an unsafe condition on an aviation product. The MCAI describes the unsafe condition as:
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 bracket following LET Aircraft Industries Information Bulletin No.: L23/054b, dated December 20, 2010.
(3) Within 10 days after the replacement required in paragraph (f)(2) of this AD, do the following actions:
(i) Send the damaged bracket to the address listed in paragraph (i)(2) of this AD.
(ii) Send a report to the address listed in paragraph (i)(2) of this AD containing the following information: Registration mark, serial number, total hours time-in-service, and number of take-offs (if available) since the sailplane has been in operation.
Note: This AD differs from the MCAI and/or service information as follows: No differences.
