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Sat, Oct 06, 2007

AD: DG Flugzeugbau

AD NUMBER: 2007-21-01
MANUFACTURER: DG Flugzeugbau GMBH
SUBJECT: Airworthiness Directive 2007-21-01
SUMMARY: We are adopting a new airworthiness directive (AD) for the products listed above. This AD results from mandatory continuing airworthiness information (MCAI) issued by the aviation authority ofanother country to identify and correct an unsafe condition on an aviation product. The MCAI describes the unsafe condition as: During a recent flight with a DG-500 ELAN Trainer, the bolt of bearing stand 5RU61, which is the pivot for bell crank 5St19, failed in-flight, leading to loss ofcontrol of the aircraft. Although the occupants managed to exit the aircraft safely, the aircraft crashed and was damaged beyond repair. While the investigation continues, the most likely cause is suspected to be insufficient tightening of the nut on the bolt of bearing stand 5RU61.This condition, if not corrected, may cause excessive bending loads, leading to premature failureof the bolt and loss of control of the aircraft. This AD requires actions that are intended to address the unsafe condition described in the MCAI.

FMI: www.faa.gov/regulations_policies/airworthiness_directives/

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