Calculated Step Climb

PEGASUS FMC
When a non-zero value is entered into the STEP SIZE line on the PERF INIT or CRZ page, the FMC calculates optimum points for step climbs as the airplane performance permits. The climb altitude is determined by the value in STEP SIZE. Multiple step climbs are possible based on performance and route length. VNAV commands the step climbs if the MCP altitude and the FMC CRZ ALT are set to the new altitude.

NON PEGASUS FMC (BASIC)
The FMC calculates the optimum point for the step climb based on airplane performance and cost factors.

1 TO STEP CLIMB

When the step climb start point is the next VNAV event, the line title changes to TO STEP CLIMB.

Displays the ETA and DTG to the point where the step climb starts.

If the airplane passes the step climb point and has not started to climb, the ETA and DTG are replaced with the word NOW.

When the FMC calculates that a step climb is not advised, the ETA and DTG are replaced with the word NONE.

2 STEP TO

Default display is 2000 feet higher than the CRZ ALT displayed in 1R.

A different altitude can be entered for a step climb evaluation. The FMC calculates the predicted step climb data and displays the results on this page and the PROGRESS page.

When entering a cruise altitude above maximum altitude, the scratchpad message MAX ALT FLXXX is displayed.

Blank when:

• there is no active flight plan, or
• within 200 NM of the T/D point, or
• in the EO D/D phase.

3 STEP POINT

Blank until STEP TO altitude is displayed, then displays the ETA and DTG to the step climb point. The line title and data remain blank if the step climb would result in a fuel penalty.

Displays NOW when past the calculated step climb point.

Line title changes to TO T/D when within 200 NM of the top of descent point. ETA and DTG are relative to the T/D point.

The data is the same as displayed on the PROGRESS page.

Pegasus | 11.42.34 | Cruise Descent>