Airworthiness directives › 2025-20-07
AD 2025-20-07 Airworthiness Directives; Fiberglas-Technik Rudolf Lindner GmbH & Co. KG (Type Certificate Previously Held by GROB Aircraft AG, Grob Aerospace GmbH i.l., Grob Aerospace GmbH, Burkhart Grob Luft- und Raumfahrt GmbH & Co. KG) Gliders
Applicability*9
This AD applies to Fiberglas-Technik Rudolf Lindner GmbH & Co. KG (type certificate previously held by GROB Aircraft AG, Grob Aerospace GmbH i.l., Grob Aerospace GmbH, Burkhart Grob Luft- und Raumfahrt GmbH & Co. KG) Model G103 TWIN II, G103A TWIN II ACRO, G103C TWIN III ACRO, and G 103 C TWIN III SL gliders, certificated in any category.
Compliance
Comply with this AD within the compliance times specified, unless already done.
Required actions
For the purpose of this AD, a “serviceable rudder” is a rudder which has accumulated zero hours time-in-service (TIS), or a rudder that has been inspected and modified, as necessary, in accordance with paragraphs (h)(1) and (2) of this AD and is found to be crack and corrosion free.
Unsafe condition
This AD was prompted by a report of corrosion on the inner sides of the welded steel rudder drive plate. The FAA is issuing this AD to detect and address corrosion and water entry in the rudder drive plate. The unsafe condition, if not detected and corrected, could affect the structural integrity of the rudder drive plate, which could lead to reduced control or loss of control of the glider.
Affected ADs
None.
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