mentarily depressing the EDS RECORD but-
ton on the engine/fuel control panel (Figure
7-19). The data will be identified for a period
four minutes before to one minute after the but-
ton was depressed.
ENGINE OIL SYSTEM
GENERAL
The engine oil system provides for cooling
and lubrication of the engine bearings, the ac-
cessory drive system, transfer gearbox, the
planetary gear assembly, and for heating of the
engine fuel supply. The oil system is a pres-
sure-scavenge system, consisting of a reser-
voir, a seven element pump, a filter, heat
exchangers, a breather valve, and pressure
and return lines.
OIL SUPPLY
The oil supply is contained in tanks mounted
to the right side of each engine. The oil level
is checked and serviced through oil servicing
doors (Figure 7-21) located on the forward
outboard side of each engine nacelle. A quan-
tity sight gage is provided on the right engine
oil tank to visually check the oil level, and dip-
sticks are provided on both oil reservoirs to
check the oil level. Oil servicing is required
if oil level is one quart low.
Oil levels should be checked during the exte-
rior inspection. If the oil quantity is not checked
within one hour of engine shutdown, an inac-
curate indication may result. If preflight oil
level checks low, start and run the affected en-
gine until stabilized at idle, shut down the en-
gine and recheck the oil level. If there is no oil
level indication, add enough oil to obtain an in-
dication before starting the engine to recheck
the oil level. Normal oil consumption is ap-
proximately 1 quart in 25 hours.
OIL SYSTEM OPERATION
Oil pressure and scavenging is provided by a
seven element pump mounted to the aft right
side of the accessory gearcase. Two elements
of the pump draw oil from the reservoir and
deliver oil under pressure to the distribution
lines. The oil passes through filtering and tem-
perature control components before being
routed to the engine for lubrication. The pump
includes a mechanical pressure regulator to
maintain a desired pressure at the fan gearbox
bearings. See Figure 7-22.
L E A R J E T 4 5
P I L O T T R A I N I N G M A N U A L
7-29
FOR TRAINING PURPOSES ONLY
FlightSafety
international
LEFT ENGINE OIL DIPSTICK
RIGHT ENGINE OIL TANK
Figure 7-21. Engine Oil Tanks