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pdf GFA AD 677 Cancelled 2018.09.12 Popular

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GFA AD 677 Cancelled 12.09.2018.pdf

GFA AD 677 Cancelled 2018.09.12

EQUIPMENT AND FURNISHINGS – SECURING ROPE FOR HEADREST OF REAR SEAT – INSPECTION / READJUSTMENT / MODIFICATION 

CANCELLED Refer EASA AD 2011-0191

DG-500/22 ELAN, DG-500 ELAN Trainer, DG-500/20 ELAN and DG-500 ELAN ORION sailplanes, all serial numbers, and DG-500 M and DG-500 MB powered sailplanes, all serial numbers, if equipped with headrest on the rear seat.  Several occurrences have been reported of incorrect re-installation of rear cockpit securing rope for the headrest of the rear seat during maintenance. In one of these occurrences, the aeroplane suffered an accident. The technical investigations following this accident have revealed that the rear cockpit headrest securing rope was too long, which caused the rear seat to interfere with the control stick of the aeroplane. This condition, if not detected and corrected, could lead to loss of control of the aeroplane. To address this unsafe condition, DG Flugzeugbau have developed a modification to be accomplished in accordance with the Working Instruction No.1 for Technical Note (TN) 348/20 in issue 3, dated 13 September 2011, for the English language version and in issue 2, dated 22 October 2008, for the German language version (English version revised at issue 3 to correct a translation discrepancy), which aims to prevent wrong re-installation of the headrest securing rope. TN 500/05 embodies this Working Instruction. For the reasons described above, this AD requires a one-time inspection of the length of the rear cockpit headrest securing rope and, in case of discrepancy, readjustment of the length. In addition, this AD requires the installation of a modified headrest securing rope with snap hook.