Summary
We propose to adopt a new airworthiness directive (AD) for the products listed above. This proposed AD results from mandatory continuing airworthiness information (MCAI) originated 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:
During an annual inspection, a water ballast hose connector was found disconnected from the fuselage wall of an Astir CS. The investigation has shown that the hose-fuselage connection bonding has been degraded over years of service. This condition, if not corrected, could lead to the following consequences:
--The water contained in the wing tanks could run down into the fuselage and fuselage tail which could cause a displacement of the sailplane centre of gravity and consequently may lead to the loss of the sailplane controllability, or/and --The loosened hose may jam the flight controls (push rods) and consequently may lead to the loss of the sailplane controllability.
The proposed AD would require actions that are intended to address the unsafe condition described in the MCAI.