All Engine Cruise

performance Initialisation Route Departures and Arrivals VNAV Fix Legs Hold Progress Menu Navigation Radio Previous page Next page

The cruise page is used to monitor and change cruise altitude and speed. Speed changes can be manually selected or automatically selected with the selection of other VNAV modes. Cruise climbs, cruise descents, and step climbs can be accomplished from the cruise page.

When using the economy mode, page data is based on operating at ECON SPD. Economy cruise speed is based on cost index. When the flight crew enters a selected speed, page data changes. When the FMC is in the engine out mode, the data changes to include the airplane capabilities with one engine inoperative. The long range cruise (LRC) mode calculates speeds to maximise airplane range.

Page Title - The page title displays active (ACT) or modified (MOD) cruise. Usually, the title contains ECON for economy cruise. Fixed speed, engine out, and long range cruise modify the title.

Page titles include:

  • CO - engine out mode and COmpany specified speed selected
  • CRZ CLB or CRZ DES - cruise climb or descent
  • ECON - speed based on cost index
  • EO - engine out mode selected
  • EO D/D - engine out drift down displayed when EO selected and the airplane altitude is above the maximum altitude for engine out performance
  • LIM SPD - based on an airplane configuration limiting speed
  • LRC - long range cruise selected
  • MCP SPD - speed intervention applied from the MCP
  • M.XXX - fixed Mach cruise speed
  • XXXKT - fixed CAS cruise speed

    • Fixed cruise speeds are for:

  • waypoint speed constraints
  • an altitude constraint associated with a speed constraint
  • a flight crew selected speed (SEL SPD).
    • CRZ ALT - Displays cruise altitude entered on PERF INIT page. Valid entries are: XXX, XXXX, XXXXX, OR FLXXX. Altitude displays in feet or flight level depending on the transition altitude. Changing the MCP altitude enters the new altitude in the scratchpad for entry. Entry creates a modification. When the modification is executed the page title changes to CRZ CLB or CRZ DES.
    ECON SPD - Displays target speed or Mach. MOD displays in the page title until the modification is erased or executed. A manually entered speed changes the line title to SEL SPD. ECON can be replaced with LRC or company (CO SPD), depending on the VNAV mode.
    EPR - Displays EPR necessary for level flight at the target airspeed.
    ECON - Blank when ECON is the active speed. Displays a prompt when ECON is not the active speed. Push - selects economy cruise speed.
    ETA/FUEL - Estimated time of arrival and calculated fuel remaining at the destination. Displays the same data for the alternate airport when a DIVERT NOW modification is selected from the ALTN page. Calculations are based on optimum step climbs and cruise altitudes.
    ENG OUT -
  • displays engine out cruise page
  • commands engine out performance calculations
  • changes CRZ ALT if above maximum engine out altitude
  • changes target speed to engine out LRC speed
  • upon execution, thrust reference mode changes to CON
    • LRC -
  • displays long range cruise page
  • changes target speed to LRC speed

    • Standard | 11.42.21 | EO CRUISE>