FUEL
Description
Aircraft Operations Manual
9/1.1
PAGE
1
Apr 01/15
1.
GENERAL
Fuel is stored in two tanks, referred to as the left
and the right tank. Maximum usable fuel capacity of
each tank is 2845 lb + 200 lb (1290 kg + 90 kg)
approximately 425 US gallons (1610 l).
A single point pressure fueling system makes it
possible to fill the tanks automatically to full or to
mid
−
level in approximately 15 min., or 8 min. re-
spectively. The tanks can also be filled to any inter-
mediate level by setting the fueling control switches
to OFF when the desired level is reached. Overwing
filler necks permit gravity fueling.
The pressure fueling system can also be used for
defueling.
Normally, the left engine is supplied by the left tank
and the right engine by the right tank, but it is also
possible to crossfeed both engines from either tank.
An interconnect line between the tanks makes it
possible to keep the tank levels equal.
There is one engine
−
driven main fuel boost pump
on each engine and an electrically driven standby
pump in each tank. The standby pump starts auto-
matically by a pressure switch in case of a main
pump failure. The standby pumps are also used for
supplying the engine with fuel during engine start
until the main pump can provide sufficient pressure.
The standby pumps are controlled by pilot operated
switches on the overhead panel and automatic
switches on the condition levers.
Fuel quantity is indicated by two gauges on the cen-
ter instrument panel and there is a low level warning
for each tank.
The fuel gauging system is designed and manufac-
tured in accordance with Class II of MIL
−
G
−
26988C
which means that the maximum error is +/
−
2% of
indication or +/
−
0.75% of full scale.
On ground, the fuel quantity can be measured by
magnetic dipsticks in the undersurface of the wing.
The magnetic dipsticks only measure fuel quantities
below 1100 lb (500 kg). Fuel quantity is also indi-
cated by two gauges on the fueling panel.
Fuel temperature is indicated on a digital display on
the overhead panel.
A11629
Fig. 1 Fuel tanks
−
location
