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 ALT INTV switch.
Push – (during VNAV cruise)

  • If MCP altitude is set above current FMC cruise altitude, FMC
      resets cruise altitude to MCP altitude and initiates a cruise climb.
  • If MCP altitude is set below current FMC cruise altitude, an early
    descent is initiated. Lower FMC cruise altitude cannot be entered
    using ALT INTV switch.

Push – (during VNAV descent)

  • The highest FMC altitude constraint above MCP altitude is deleted
  • If the airplane is currently at an FMC altitude constraint, deletion
    allows the airplane to continue descent. MCP altitude must be set
    below current altitude
  • If all FMC altitude constraints are deleted during VNAV path descent,
    an automatic transition to a VNAV speed descent is made.
Allows manual deletion of next FMC altitude constraint via altitude SEL and
ALT INTV switch.
Option - With speed and altitude intervention
Heading
Bank Angle
Collins MCP
Glareshield - MCP 700/800/900