(a) The Destination Waypoint. An arrow
is displayed to the left of the identifier if the waypoint is
the active waypoint.
(b) The fuel units as received from the
(c) The Fuel Presently On Board (FOB).
To change the present fuel on board:
1. Turn to the OTH 5 page.
2. Press the left CRSR button to turn
on the cursor function.
3. Enter the current fuel on board
using the left inner and outer
4. Turn the cursor function off.
(d) The fuel required to reach the
destination waypoint at the current rate of fuel flow and
the present groundspeed (REQD).
(e) The landing fuel on board (L FOB) is
the original fuel on board minus the total fuel required
to reach the destination.
(f) The desired fuel reserve (RES) is the
amount of reserve fuel the pilot has entered. The fuel
must be entered in the same units displayed on the
first line. To enter the reserve, press the left CRSR
button, rotate the left outer knob to move the cursor
over the RES field. Use the left inner and outer knobs
to enter the desired fuel quantity. Press the left CRSR
button to turn off the left cursor function.
(g) The calculated extra fuel (EXTRA) is
the landing fuel on board (L FOB) minus the fuel
(2) OTH 6 Page. The OTH 6 page displays
the following. Refer to Figure 3D-76.
Figure 3D-76. OTH 6 Page
(a) The endurance (ENDUR) in hours
and minutes. The endurance is calculated based on
the amount of fuel remaining after subtracting out the
reserve (RES) entered on the OTH 5 page or the OTH
6 page from the present fuel on board.
(b) The range (RANGE), which is the
distance in nautical miles that could be flown based on
the endurance calculated above and the present
(c) The fuel efficiency, which is the
groundspeed divided by the present fuel flow.
(d) The desired fuel reserve (RES).
Same as displayed on the OTH 5 page. Changing the
reserve on one of the two pages also changes it on the
(3) OTH 7 Page. The OTH 7 page displays
rate of fuel flow as depicted in Figure 3D-77.
ENG 1 301
ENG 2 295
Figure 3D-77. OTH 7 Page
(4) OTH 8 Page. The OTH 8 page displays
the amount of fuel used as depicted in Figure 3D-78.
ENG 1 308
ENG 2 301
Figure 3D-78. OTH 8 Page