Flight Controls
T-45A UJPT, E2-C2, ADV, & IUT Eng-11
2.
Electrical: 28 VDC essential services bus
powers speed brake selection
C.
Hydraulic system
Sg 4, fr 5
1.
Ailerons and stabilator are tandem actuator
WARNING
CAUTION
HYDFAIL
RATEXTEND
LIGHT
LIGHT
CAUTION
CAUTION
HYD1PRESS LIGHT
HYD2PRESS
LIGHT
MICRO
SWITCH
RAT
RESERVOIR
RESERVOIR
design--failure of either hydraulic system
FCACCUM
FCACCUM
EDP
EDP
does not affect operation
L AIL
PRIORITY
VALVE
RAIL
HAND
STAB
PUMP
2.
Flaps interface with HYD 1 only--wheel
SPD BRK
SLATS
LGEAR
NWS
FLAPS
L BAR
brake/ emergency flap accumulator
HOOK
HYD1PRESSURE
MECHANICAL
HYD2PRESSURE
WHL BRKS
CHECK VALVE
PRESSURIZED WITH
FLAP EMERGENCY
provides backup power in event of failure
RAT EXTENDED
SELECTOR/PRIORITY
AND GATE
VALVE
ELECTRICAL
HYDRAULIC SYSTEM BLOCK
DIAGRAM
3.
Slats interface with HYD 1 only--there is no
backup power in the event of failure
4.
Speed brake system has no redundancy
D.
Electrical system
1.
28 VDC generator bus powers
a.
Aileron trim
b.
Rudder trim
c.
Trim indicators and stabilator position
indicators
d.
Standby stabilator trim
e.
Control augmentation
2.
28 VDC essential services bus powers
a.
Primary stabilator trim
b.
Flaps/slats
c.
Emergency flaps
d.
Speed brakes
Page 11-31
(8-03) Original
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