T-45C TS, ADV & IUT ENG-27/ENG-28
Engineering Review
(1) Down: permits fuel flow supply to the
engine and GTS
(2) Pull up: isolates aircraft fuel system from
the engine and GTS
Sg 4, fr 22
D. Fuel system interfaces 1.4.7.2
Fig 6: Simplified Fuel
System Block Diagram
1.
Inputs
a.
Electrical system
(1) Indicators: 28 VDC essential services bus
power source (boost pumps continue
operating for 30 seconds after generator
loss)
(2) Boost pumps: 28 VDC essential services
bus power source
(a) During starting (both ground and air
starts), energized by 28 VDC essential
services bus when the GTS start
button is pressed and will drop off line
30 seconds after GTS shutdown
unless generator comes on line
b.
Engine air system: output of fifth stage high
pressure compressor filtered, regulated to 6.0
psi, and distributed to fuel tanks for
2.
Outputs
a.
Engine starting system
b.
Engine fuel system
c.
Centralized warning system (CWS): MASTER
ALERT light flashes concurrently with caution
advisory indications (FUEL, F PRES and
BINGO)
(9-98) Original
Page 27-44
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