Collins MCP
Mode Control Panel
While engaged in the APP mode:

  • The A autopilot and Captain’s F/D use information from the
    Captain’s Course Selector and No. 1 VHF NAV receiver.
  • The B autopilot and First Officer’s F/D use information from
    the First Officer’s Course Selector and No. 2 VHF NAV
    receiver.
  • Different courses and/or frequencies for the two VHF NAV
    receivers can cause disagreement between Captain’s and
    First Officer’s F/D displays and affect A/P operation.
Option - CWS deactivated on approach

After localizer and glideslope capture, CWS cannot be engaged by
manually overriding pitch and roll. Manual override of the autopilots
causes autopilot disengagement.