Engine and Related Systems
T-45C TS, ADV & IUT ENG-04
(b) Signals centralized warning system
Overlay 8
(CWS) if the differential oil pressure
OIL PRESS Warning
Light
drops below 10 psi, causing OIL
PRESS warning light to illuminate
(c) Incorporates a 10 second delay to
avoid signaling transient pressures
(7) Scavenge system
(a) Three oil pumps scavenge and return
Overlay 9
oil to oil tank from three distribution
Scavenge System
areas
(b) Scavenge return lines contain
magnetic chip detectors and return oil
strainers to safeguard engine
components
2.
Monitoring
a.
Oil differential switch measures pressure
differential between internal gearbox oil-feed
and scavenge and signals CWS if oil pressure
drops below 10 psi. There is no oil pressure
gauge in cockpit.
Sg 2, fr 28
(10 Overlays)
Engine Starting System
b.
Oil tank sight gauge monitored by ground crew
Block Diagram
(aircrew for cross-country flights)
c.
Minimum oil level for flight: 2 liters (4.2 U.S.
pints) below FULL mark. Consumption is
approximately 0.8 pints per flight hour
D.
Engine starting system: engine is started (on ground or
by assisted relight in flight) via GTS and ATS
Overlay 1
1.
Starting system component function
GTS
Overlay 2
a.
GTS: gas turbine air producer unit
(1) GTS starter motor and GTS igniters
Overlay 3
powered by 28 VDC essential services bus
Fuel
Original (9-98)
Page 4-15
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