TM 55-1510-222-10 Table 3-1.  Autopilot System Limits (Sheet 2 of 2) MODE CONTROL OR SENSOR PARAMETER VALUE GA Control Switch Fixed Pitch-Up 7 Pitch Up on Throttles Command, Wings Level Pitch Sync TCS Switch on Control Pitch Altitude Command 20 Wheel Maximum ALT Hold Air Data Computer ALT Hold Engage Range 0 to 50,000 ft ALT Engage Error 20 ft. Pitch Limit 20 Pitch Rate Limit Function of (TAS) VS Hold Air Data Computer VERT Speed Engage Range 0 to 6,000 ft/min ALT Speed Hold Engage Error Pitch Limit 30 ft/min 20 Pitch Rate Limit Function of (TAS) IAS Hold Air Data Computer IAS Engage Range 80 to 45 knots IAS Hold Engage Error 5 knots Pitch Limit 20° Pitch Rate Limit Function of (TAS) ALT Prese- Air Data Computer Preselect Capture Range 0 to 50,000 ft lect Maximum Vertical 400 ft/min Speed for Capture Maximum Gravitational 20g Force During Capture Maneuver NL20° Pitch Limit Function of (TAS) Pitch Rate Limit (c)  SOFT  RIDE  Annunciator/Pushbutton  Switch. Soft  ride  reduces  autopilot  gains  while  still  maintaining stability in rough air.  This mode may be used with any Flight Director mode selected. (d) TURN Knob.  Rotation of the turn knob out of detent  results  in  a  roll  command.    The  roll  angle  is proportional  to  and  in  the  direction  of  the  turn  knob rotation.      The   turn   knob   must   be   in   detent   (center position) before the autopilot can be engaged.  Rotation of  the  turn  knob  cancels  any  other  previously  selected lateral mode. (e)  YD  ENGAGE  Pushbutton  Switch.    When  the autopilot   is   not   engaged,   the   yaw   damper   may   be utilized by depressing the YD ENGAGE pushbutton. (f)   AP   ENGAGE   Pushbutton   Switch.      The   AP ENGAGE    switch    is    used    to    engage    the    autopilot. Engaging  the  autopilot  automatically  engages  the  yaw damper.      The   autopilot   may   be   engaged   with   the aircraft in any reasonable attitude. (g)  Elev  TRIM  Annunciators.    The  elevator  trim annunciator indicates UP or DN when a sustained signal is being applied to the elevator servo.  The annunciator should not be illuminated when engaging the autopilot. (3)   Autopilot   Disengagement.        The    autopilot    is normally   disengaged   by   momentarily   depressing   the control   wheel   AP   DISC   switch.      The   autopilot   may however be disengaged by any of the following: 1.      Actuation   of   the   control   wheel   AP DISC    button.        Disengagement    is confirmed   by   5   flashes   of   the   AP ENG annunciator. 2.    Pressing  the  respective  vertical  gyro FAST ERECT button. 3.        Actuation    of    respective    compass INCREASE-DECREASE switch. 4.          Selection     of     Go-Around     mode. Disengagement  is  confirmed  by  the AP ENG annunciator flashing 5 times and  illumination  of  the  GA  and  YD ENG annunciators. 5.      Pulling   the   autopilot   CONTROL   & AFCS DIRECT circuit breaker. 6.    Pressing  the  autopilot  AP  ENGAGE pushbutton. 7.  Any of the following malfunctions will 3-41