Airworthiness Directive · Amendment 39-15549 · Engine air
MORAVAN a.s. Model Z-143L Airplanes
This AD applies to Model Z-143L airplanes, all serial numbers (SNs), 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 an 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) For all serial numbers (SNs) through SN 0044:
(i) Before further flight after July 16, 2008 (the effective date of this AD), inspect the vortex inserts inside the carburetor heating system heat exchanger for cracks and/or loose or missing rivets following paragraph 8 of Moravan Aviation s.r.o. Mandatory Service Bulletin Z143L/31a, dated June 8, 2007.
(ii) Before further flight, if as a result of the inspection required by paragraph (f)(1)(i) of this AD, you find any cracks and/or loose or missing rivets for the vortex inserts, replace all vortex inserts with new vortex inserts made from stainless steel following paragraph 8 of Moravan Aviation s.r.o. Mandatory Service Bulletin Z143L/31a, dated June 8, 2007.
(2) For SN 0045 and greater: Within 110 hours time-in-service (TIS) after July 16, 2008 (the effective date of this AD) or within 60 days after July 16, 2008 (the effective date of this AD), whichever occurs first, inspect the vortex inserts inside the carburetor heating system heat exchanger following new instructions introduced by new pages 05-28, 75-7, 75-7A, and 75-8 of ZLIN Z 143 L Airplane Maintenance Manual, Revision No. 9, dated: June 8, 2007, and replace with new vortex inserts made from stainless steel, if cracks and/or loose or missing rivets for the vortex inserts are found.
(3) For all SNs: Within 60 days after July 16, 2008 (the effective date of this AD), incorporate new pages 01-11, 01-12, 01-24, 01-35, 05-28, 75-7, 75-7A, 75-7B, and 75-8 of ZLIN Z 143 L Airplane Maintenance Manual, Revision No. 9, dated: June 8, 2007, into your maintenance program. These pages include compliance times and procedures for repetitive inspections and corrective actions.
Note: This AD differs from the MCAI and/or service information as follows: The MCAI requires compliance for the inspection of SN 0045 and greater at the next shop visit or within 110 hours TIS after the effective date of the MCAI. To assure the AD is clear for U.S. operators and all airplanes have the inspection done in a timely manner, this AD requires compliance for the inspection of SN 0045 and greater within 110 hours TIS after July 16, 2008 (the effective date of this AD) or within 60 days after July 16, 2008 (the effective date of this AD), whichever occurs first.
