Airworthiness Directive · Amendment 39-17150 · Flight controls
HPH s. r.o. Sailplanes
This AD applies to HPH s. r.o. Models 304C, 304CZ, and 304CZ-17 sailplanes, all serial numbers, certificated in any category.
We are adopting a new airworthiness directive (AD) for all HPH s. r.o. Models 304C, 304CZ, and 304CZ-17 sailplanes. 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 the lack of a drain hole in the elevator control rod, which may allow water to accumulate in the control rod and lead to possible corrosion. This condition could cause the elevator control rod to fail, which could result in loss of control of the sailplane. We are issuing this AD to require actions to address the unsafe condition on these products.
Unless already done, do the following actions in accordance with HPH spol. s. r.o. Service Bulletin No.: G304CZ—06 a)_R01, G304C—06 a)_R01, G304CZ17—06 a)_R01, dated April 23, 2012:
(1) Within 30 days after September 12, 2012 (the effective date of this AD), inspect the elevator control rod in the vertical fin.
(2) If you find any deficiency during the inspection required by paragraph (f)(1) of this AD, before further flight, replace the elevator control rod with an elevator control rod that has a drain hole.
(3) Within 9 months after September 12, 2012 (the effective date of this AD), unless already done as required by paragraph (f)(2) of this AD, replace the elevator control rod in the vertical fin with an elevator control rod that has a drain hole.
(4) As of September 12, 2012 (the effective date of this AD), do not install an elevator control rod without a drainage hole.
The aircraft, engines and makers this AD names, by the model designations in its text. A model listed here may still be outside the AD's serial ranges.
Aircraft
