Airworthiness directives › 2004-17-04
AD 2004-17-04 Airworthiness Directives; Grob-Werke Gmbh & Co KG Models G102 CLUB ASTIR III, G102 CLUB ASTIR IIIb, and G102 STANDARD ASTIR III Sailplanes
Applicability*9
(c) This AD affects the following Models G102 CLUB ASTIR III, G102 CLUB ASTIR IIIb, and G102 STANDARD ASTIR III sailplanes, all serial numbers, that are certificated in any category.
Required actions
(e) To address this problem, you must do the following, unless already done: Actions Compliance Procedures (1) Install additional mass balance in the elevator and ailerons and determine resultant empty weight and empty weight center of gravity Within the next 25 hours time-in-service (TIS) after October 7, 2004 (the effective date of this AD) Follow GROB Luft-und Raumfahrt Service Bulletin No. MSB306-36/3, dated December 4, 2002; GROB Luft-und Raumfahrt Service Installation Instructions No. MSB306-36/3, dated April 18, 2002; and Instructions for Continued Airworthiness GROB G 102, Revision 1, dated April 18, 2002. The applicable sailplane maintenance manual also addresses this issue. (2) Incorporate Instructions for Continued Airworthiness GROB G 102, Revision 1, dated April 18, 2002, in the sailplane maintenance manual, or other appropriate document Before further flight after installing the additional mass balance and determining the empty weight and empty weight center of gravity required by paragraph (e)(1) of this AD Not applicable. (3) Remove the red mark on the airspeed indicator (formerly required by AD 2001-26-25) at 165 kilometers/hour (km/h), 89.1 knots (kts), or 102.5 miles per hour (mph) Before further flight after installing the additional mass balance and determining the empty weight and empty weight center of gravity required by paragraph (e)(1) of this AD Follow GROB Luft-und Raumfahrt Service Bulletin No. MSB306-36/3, dated December 4, 2002, and GROG Luft-und Raumfahrt Service Installation Instruction No. MSB306-36/3, dated April 18, 2002. The applicable sailplane maintenance manual also addresses this issue. (4) Remove the red placard to the airspeed indicator (formerly required by AD 2001-26-25) restricting the Vne airspeed to 165 km/h, 89.1 kts, or 102.5 mph (according to the airspeed indicator calibration) Before further flight after installing the additional mass balance and determining the empty weight and empty weight center of gravity required by paragraph (e)(1) of this AD Not applicable.
Unsafe condition
(d) This AD is the result of mandatory continuing airworthiness information (MCAI) issued by the airworthiness authority for Germany. The actions specified in this AD are intended to prevent elevator flutter, which could cause structural damage. Such damage could result in loss of control of the sailplane.
Affected ADs
(b) This AD supersedes AD 2001-26-25.
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