Instruction Manual

Advanced GPS Operation
4-42
Advanced GPS Operation
Chapter 4
CAUTION: The KLN 89(B) fuel calculations are based on the pre-
sent rate of fuel flow, the present groundspeed, the present
distance to destination along the programmed route, and the
amount of fuel presently remaining. Before take-off, the fuel flow
computer must be properly initialized with the amount of fuel on
board (FOB) the aircraft. For some Shadin fuel computers without
display units, you may enter the initial FOB during the KLN 89(B)
Turn-on and Self Test (see section 3.2). Since many factors influ-
ence the required amount of fuel to reach the destination, it is the
pilot’s responsibility to view the fuel management pages often to
check for any significant changes. Some factors affecting the
amount of fuel required are power changes, altitude changes, head-
wind/tailwind component changes, fuel/air mixture adjustments,
and routing changes.
The OTH 7, OTH 8, OTH 9, and OTH 10 pages are used to display fuel
management information for KLN 89(B)s interfaced with compatible fuel
management computers. If there is no fuel management computer inter-
face, these fuel management pages are not displayed.
4.8.1. THE OTHER 7 (OTH 7) PAGE
The OTH 7 pages display the following
information (figures 4-131 and 4-132):
• The destination waypoint (the
final waypoint in FPL 0 or a direct
to waypoint if the waypoint is not
included in FPL 0). An arrow is
displayed to the left of the identifi-
er if the waypoint is the active
waypoint.
• The fuel units as received from
the fuel management computer.
GAL gallons
LB pounds
IMP imperial gallons
L liters
KG Kilograms
• The fuel presently on board (Fuel OB). In most installations this is
defined by using the fuel flow computer’s control unit. However, if
APT VOR NDB INT USR ACT NAV FPL CAL SET OTH
åå.ånm|KLFT GAL
åååååå|Fuel OB 126
Leg|Fuel Reqd 90
OTH+7 |Ldg Fuel OB 36
Figure 4-131
APT VOR NDB INT USR ACT NAV FPL CAL SET OTH
åå.ånm|KLFT GAL
åååååå|Fuel Reserv:0030
Leg|Extra Fuel 6
OTH+7 |
Figure 4-132