62 referring to fig3 d the no back 16 is shown in a no back or holding load condition schematically represented in fig6 such a no back condition may be created when the actuator input 20 is insufficient to oppose the load 17 or when the actuator input 20 fails due to a failure of the pdu 14 or the drive line torque shaft 12 for example in absence of actuator input 20 or when the actuator input 20 is insufficient to oppose the load 17 the load 17 may cause reverse rotation of the no back output shaft 36 which in turn may cause output disc 38 to rotate relative to input disc 32 because the no back output shaft 36 is only coupled to the output disc 38 and not both of the input and output discs 32 38 in this regard the deep center portions 62 of the ballramps 35 37 will also rotate out of alignment and the balls 44 will be moved toward the shallow ends 60 64 of the ballramps 35 37 as shown in fig3 f because the shallow ends 60 64 do not extend as deeply into the respective input and output discs 32 38 as the deep center portion 62 the positioning of the balls 44 causes the output disc 38 to become axially spaced from input disc 32 by a distance x 2 this position may be referred to as an extended position shown in fig3 f which is greater than the distance x 1 this positioning of the balls 44 generates an axial load on the input and output discs 32 38.