AD Amdt-39-10905
Unsafe Condition
Fatigue cracking of the landing gear legs, which could result in landing gear failure with consequent loss of control of the sailplane during landing operations.
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Required Actions
Inspect the retaining bars' chamfer radius on both landing gear legs for a minimum of 3.0 millimeters. If the chamfer radius is 3.0 mm or greater, glue a reinforcing plastic strip to the retaining bar. If the chamfer radius is less than 3.0 mm, replace the retaining bar with a new improved design and install the plastic strip. Inspect the landing gear legs for cracks and proper thickness, and either polish out the cracks or replace the landing gear legs with parts of improved design depending on the crack length.
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Compliance Time
Within 120 calendar days after the effective date of this AD.
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Affected Aircraft
Grob Luft-und Raumfahrt, GmbH Models G 109 and G 109B sailplanes, all serial numbers, certificated in any category.
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Source: Official FAA Source ↗
Retrieved: Apr 6, 2026
Rights: U.S. Government Public Domain
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