Airworthiness Directive · Amendment 39-14554 · BURKHART GROB LUFT-UND-RAUMFAHRT GmbH & Co. KG, Model G 103 C Twin III SL Sailplanes
BURKHART GROB LUFT-UND-RAUMFAHRT GmbH & Co. KG, Model G 103 C Twin III SL Sailplanes
This AD affects the Model G 103 C Twin III SL sailplanes, serial numbers 35002 through 35051, that are certificated in any category.
The FAA adopts a new airworthiness directive (AD) that supersedes AD 97-24-09, which applies to certain BURKHART GROB LUFT- UND-RAUMFAHRT GmbH & Co. KG (Grob) Model G 103 C Twin III SL sailplanes. AD 97-24-09 currently requires repetitively inspecting the propeller bearing and upper pulley wheel for increased play and, if increased play is found, modifying the propeller bearing and pulley wheel. This AD results from mandatory continuing airworthiness information (MCAI) issued by the airworthiness authority for Germany. Consequently, this AD requires you to modify the propeller bearing and upper pulley wheel by installing a new securing plate and tightening the grooved nut to the new torque values. We are issuing this AD to prevent loss of the sailplane propeller caused by increased play in the current design propeller bearing and upper pulley wheel. This could result in loss of control of the sailplane.
To address this problem, you must do the following:
| Actions | Compliance | Procedures |
|---|---|---|
| Modify the propeller bearing and upper pulley wheel by installing a new securing plate, part number (P/N) 103SL-6400.12, and tightening the grooved nut, P/N 103SL-W-6400. Use the new torque values as specified in the GROB Luft-und Raumfahrt Service Bulletin MSB869-18/3, dated May 24, 2002 | Within 25 engine operating hours after May 9, 2006 (the effective date of this AD) | Follow GROB Luft-und Raumfahrt Service Bulletin No. 869-18, dated March 7, 1996 (including the reissued page 6 from GROB Luft-und Raumfahrt Service Bulletin No. 869-18/2, dated July 8, 1996, issued as a complement and a correction to GROB Luft-und Raumfahrt Service Bulletin No. 869-18, dated March 7, 1996) and GROB Luft-und Raumfahrt Service Bulletin MSB869-18/3, dated May 24, 2002. Use the new torque values as specified in the GROB Luft-und Raumfahrt Service Bulletin MSB869-18/3, dated May 24, 2002. |
The aircraft, engines and makers this AD names, by the model designations in its text. A model listed here may still be outside the AD's serial ranges.
