pdf Gfa ad 590 issue 2 Popular

REDUCTION OF OPERATING SPEEDS, PROHIBITION OF AEROBATICS AND INSTALLATION OF NEW MARKINGS AND PLACARDS - REMOVAL OF ABOVE LIMITATIONS

ISSUE 1 of this AD called for a reduction in operating speeds, prohibition of aerobatics and the installation of new markings and placards in accordance with LBA AD No. 2003-185 and Grob Alert SB No. ASB 315-63/2.

ISSUE 2 reverses the instructions in Issue 1 with regard to the G 103 Twin II, and some but not all restrictions on the G 103 Twin II Acro or G 103 Twin III Acro. For full restoration of limits for Acro versions, see AD 606.

Following an in-flight failure, initial investigations indicated the possibility of insufficient fuselage reserve strength at limit loads. Subsequent investigations have shown that the reserve strength is satisfactory and thus the restrictions are now lifted.

1.     Reductions to  Vne, Maneuver and Rough Air speeds are withdrawn and ASI markings & cockpit placards may be returned to original markings and limits. Modified ASI markings and placards are to be fitted to Twin III Acro.

2.    Placard prohibiting aerobatics may be removed. ‘Simple’ aerobatics ie  Spinning, loop, lazy eight, chandelle are now approved (Not Twin III Acro).

Luftfahrt-Bundesamt (LBA) AD No.2004-002 and Grob SB No. MSB 315-65 form part of this AD.