AD 2025-20-07
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| aircraft | GROB Aircraft AG | Various | 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 |
Unsafe Condition
Corrosion on the inner sides of the welded steel rudder drive plate could affect the structural integrity of the rudder drive plate and lead to reduced control or loss of control of the glider.
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Required Actions
Repetitive inspections of the rudder drive plate for corrosion and possible water entry, a one-time detailed inspection and modification of the rudder drive plate, replacement of the rudder assembly if corrosion is found during the inspections that exceed light surface rust, and applying additional sealing to the rudder drive plate.
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Compliance Time
Before further flight
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Affected Aircraft
Fiberglas-Technik Rudolf Lindner GmbH & Co. KG Model G103 TWIN II, G103A TWIN II ACRO, G103C TWIN III ACRO, and G 103 C TWIN III SL gliders.
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Source: Official FAA Source ↗
Retrieved: Apr 4, 2026
Rights: U.S. Government Public Domain
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