ED Decision 2003/18/RM
(a) Any short period oscillation not including combined lateral-directional oscillations occurring between the stalling speed and the maximum allowable speed appropriate to the configuration of the aeroplane must be 'heavily damped with the primary controls -
(1) Free; and
(2) In a fixed position
(b) Any combined lateral-directional oscillations ('Dutch roll') occurring between the stalling speed and the maximum allowable speed appropriate to the configuration of the aeroplane must be damped to 1/10 amplitude in 7 cycles with the primary controls -
(1) Free; and
(2) In a fixed position.
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