AMC
25.253(a)(4) Lateral Control: Roll Capability
ED Decision 2003/2/RM
An acceptable method of demonstrating compliance with CS 25.253(a)(4) is as follows:
1 Establish a steady 20° banked turn at a speed close to VDF/MDF limited to the extent necessary to accomplish the following manoeuvre and recovery without exceeding VDF/MDF. Using lateral control alone, it should be demonstrated that the aeroplane can be rolled to 20° bank angle in the other direction in not more than 8 seconds. The demonstration should be made in the most adverse direction. The manoeuvre may be unchecked.
2 For aeroplanes that exhibit an adverse effect on roll rate when rudder is used, it should also be demonstrated that use of rudder in a conventional manner will not result in a roll capability significantly below that specified above.
3 Conditions for 1 and 2:
Wing-flaps retracted.
Speedbrakes retracted and extended.
Landing gear retracted.
Trim. The aeroplane trimmed for straight flight at VMO/MMO. The trimming controls should not be moved during the manoeuvre.
Power:
(i) All engines operating at the power required to maintain level flight at VMO/MMO, except that maximum continuous power need not be exceeded; and
(ii) if the effect of power is significant, with the throttles closed.
Loading collections...