AD 2004-25-17 Airworthiness Directives; LETECKÉ ZÁVODY Model L 23 SUPER-BLANIK Sailplanes

(c) This AD affects Model L 23 SUPER—BLANIK sailplanes, all serial numbers up to and including 039019, that are certificated in any category.

(e) To address this problem, you must do the following:   Actions Compliance Procedures (1) Do a non-destructive magnetic test (NDMT) inspection on the elevator rocker lever (part number A 730 201 A) for cracks and deficiencies Initially inspect within the next 25 hours time-in-service (TIS) after January 28, 2005 (the effective date) of this AD. If no cracks or deficiencies are found, reinstall and repetitively inspect thereafter at intervals not to exceed 100 hours TIS until the replacement in paragraph (e)(2) of this AD is done. The replacement in paragraph (e)(2) of this AD is the terminating action for the repetitive inspection requirements in this AD Follow the work procedures in LETECKÉ ZÁVODY Mandatory Bulletin MB No.: L23/48a, not dated. (2) If cracks are found during any inspection required in paragraph (e)(1) of this AD, send the cracked part and a report of the inspection that contains the information about the position and size of cracks, the serial number of the sailplane, and the total number of hours TIS since new to LETECHKÉ ZÁVODY at the address specified in paragraph (h) of this AD (i) The manufacturer will send you a replacement part for installation. (ii) The Office of Management and Budget (OMB) approved the information collection requirements contained in this regulation under the provisions of the Paperwork Reduction Act of 1980 (44 U.S.C. 3501 et seq. ) and assigned OMB Control Number 2120-0056 Return the cracked elevator rocker lever to the manufacturer and install the replacement part prior to further flight after the inspection in which cracks are found. Prior to installing the new part, place a permanent (paint) blue dot approximately 0.25 inches in diameter in an open location on the elevator rocker lever. Installing the replacement part received from the manufacturer is the terminating action for the repetitive inspection requirements in paragraph (e)(1) of this AD Follow the work procedures in LETECHKÉ ZÁVODY Mandatory Bulletin MB No.: L23/48a, not dated. (3) You may terminate the repetitive inspections required in paragraph (e)(1) of this AD by: (i) Replacing the elevator rocker lever with one obtained from the manufacturer at the address specified in paragraph (h) of this AD; and (ii) Prior to installing the new part, place a permanent (paint) blue dot approximately 0.25 inches in diameter in an open location on the elevator rocker lever At any time after the initial inspection required in paragraph (e)(1) of this AD Not applicable. (4) If you have already replaced the defective elevator rocker lever with a manufacturer-approved lever that was produced in January 2004 or later following LETECHKÉ ZÁVODY Mandatory Bulletin MB No.: L23/48a, not dated, you may take credit for compliance with this AD by having an appropriately-rated mechanic do the following: (i) Make a log book entry showing compliance with this AD; and (ii) Place a permanent (paint) blue dot approximately 0.25 inches in diameter in an open location on the newly installed elevator rocker lever. As of January 28, 2005 (the effective date of this AD) Not applicable.

(d) This AD is the result of mandatory continuing airworthiness information (MCAI) issued by the airworthiness authority for the Czech Republic. We are issuing this AD to prevent fatigue failure of the elevator rocker lever. This failure could lead to loss of control of the sailplane.

(b) None.