Collins MCP
Mode Control Panel
Altitude Intervention (ALT INTV) Switch





Push – (during VNAV climb)

  • Lowest FMC altitude constraint below selected MCP altitude
    is deleted.
  • If the airplane is currently at an FMC altitude constraint,
    deletion allows the airplane to resume climb. MCP altitude
    must be set above current altitude.
  • For each press of switch, one deletion occurs.
  • If MCP altitude is set above current FMC altitude, FMC cruise
    altitude resets to MCP altitude. FMC cruise altitude cannot be
    decreased using the ALT INTV switch.

Push – (during VNAV cruise)

  • If MCP altitude is set above the current FMC cruise altitude,
    FMC resets cruise altitude to MCP altitude and initiates a
    cruise climb.
  • If MCP altitude is set below the current FMC cruise altitude, an
    early descent is initiated. Lower FMC cruise altitude cannot
  • be entered using the ALT INTV switch.
Allows manual deletion of next FMC altitude constraint via altitude
SEL and ALT INTV switch.
Option - With speed and altitude intervention