AD Amdt-39-13676
Unsafe Condition
The safety margins established in the design of the fuselage may not have been sufficient to sustain limit loads during certain maneuvers and during flight at certain speeds, potentially leading to reduced structural integrity and loss of control.
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Required Actions
Revise the modification to airspeed indicators, install a revised flight speed reduction placard, and revise the flight and maintenance manual for certain Models G103A TWIN II ACRO and G103C TWIN III ACRO sailplanes. Simple aerobatic maneuvers are re-approved for Model G103A TWIN II ACRO sailplanes. An option to modify the rear fuselage for Models G103A TWIN II ACRO and G103C TWIN III ACRO sailplanes is included to terminate flight limitation restrictions for aerobatic maneuvers.
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Compliance Time
Within 12 months of the effective date (August 12, 2004)
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Affected Aircraft
BURKHART GROB LUFT-UND RAUMFAHRT GmbH & CO KG Models G103 TWIN ASTIR, G103A TWIN II ACRO, and G103C TWIN III ACRO sailplanes. Model G103 TWIN II is removed from applicability.
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Source: Official FAA Source ↗
Retrieved: Apr 4, 2026
Rights: U.S. Government Public Domain
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