AD 91-02-04
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| aircraft | Burkhart Grob Luft-Und | G103 Twin Astir | Airworthiness Directives; GROB WERKE GMBH & CO. KG (GROB) Models G103 "Twin Astir" (including "Trainer") and G103 "Twin II" (including "ACRO") Gliders |
| aircraft | Burkhart Grob Luft-Und | G103 Twin II | Airworthiness Directives; GROB WERKE GMBH & CO. KG (GROB) Models G103 "Twin Astir" (including "Trainer") and G103 "Twin II" (including "ACRO") Gliders |
| aircraft | Burkhart Grob Luft-Und | G103A Twin II Acro | Airworthiness Directives; GROB WERKE GMBH & CO. KG (GROB) Models G103 "Twin Astir" (including "Trainer") and G103 "Twin II" (including "ACRO") Gliders |
Unsafe Condition
The incorrect installation of the aileron system connecting bolt could lead to a failure of the aileron control system.
AI-generated summary from the source AD text. Verify against the official source before acting.
Required Actions
Install GROB forkhead nut (part number 103B-4229), remove the caution placard on the aileron control lever adjacent to the connecting bolt, as per GROB Service Bulletin No. TM 315-38/1.
AI-generated summary from the source AD text. Verify against the official source before acting.
Compliance Time
within the next 50 hours time-in-service after the effective date of this AD
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Affected Aircraft
GROB Models G103 Twin Astir (including Trainer) gliders (S/N 3000 through 3291) and G103 Twin II (including ACRO) gliders (S/N 3501 through 3729)
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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