 The aircraft was not modified to allow this and no changes to the operating procedures were required as the centre of gravity constraints were not exceeded.Grob have applied to EASA for permission to have an exception to the design standard (CS22) for the Grob 109B which would allow it to be certified to a similar 903 kg Max AUW however while the two objections received were rejected by EASA the authority has not yet taken the necessary rulemaking action to allow this.Cruising speed is in the region of 60–100 knots (110–190 km/h) on the engine, which can give the aircraft a top speed of .