Collins MCP
Mode Control Panel
Altitude Intervention (ALT INTV) Switch   (cont'd.)

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.