AD 99-20-11
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| aircraft | Burkhart Grob Luft-Und | G103 Twin II | Airworthiness Directives; Burkhart Grob Luft - Und Raumfahrt GmbH & CO KG Models G103 TWIN II and G103A TWIN II ACRO Sailplanes |
| aircraft | Burkhart Grob Luft-Und | G103A Twin II Acro | Airworthiness Directives; Burkhart Grob Luft - Und Raumfahrt GmbH & CO KG Models G103 TWIN II and G103A TWIN II ACRO Sailplanes |
Unsafe Condition
Cracks in the fastening (knurled) nut at the rear control stick could result in loss of control of the sailplane during flight instruction operations because the instructor may lose the ability to utilize the rear control stick.
AI-generated summary from the source AD text. Verify against the official source before acting.
Required Actions
Prior to each flight, check the fastening (knurled) nut at the rear control stick for cracks. Replace the nut with a stainless steel part number 103-4205.03/2 either immediately if cracks are found or within 4 calendar months after the AD's effective date if no cracks are found.
AI-generated summary from the source AD text. Verify against the official source before acting.
Compliance Time
Within the next 4 calendar months after the effective date of this AD if no cracks are found during any preflight check
AI-generated summary from the source AD text. Verify against the official source before acting.
Affected Aircraft
Burkhart Grob Luft-Und Raumfahrt GmbH & CO KG Models G103 TWIN II (serial numbers 3501 through 3729) and G103A TWIN II ACRO (serial numbers 3501K through 3729K)
AI-generated summary from the source AD text. Verify against the official source before acting.
Source: Official FAA Source ↗
Retrieved: Apr 8, 2026
Rights: U.S. Government Public Domain
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