T-45A UJPT, E2-C2, ADV, & IUT Eng-09
Hydraulic System
NOTE: Indicators
occasionally pop out due
to pressure fluctuations or g
forces encountered during
hard landings.
(2) HYD 1 reservoir indicator
Sg 2, fr 11
(a) Indicates quantity of hydraulic
fluid in HYD 1 reservoir
C
U
0
IN
CH
200
(b) Quantity will vary according to
temperature of fluid and
RESERVOIR GAUGE
pressure in system
HYD 1 RESERVOIR INDICATOR
(c) Calibrated 0-340 cubic inches
in 10 cubic-inch increments
and labeled every 100 cubic
inches
E.
HYD 1 malfunctions
Sg 2, fr 12 (4 overlays)
WARNING
CAUTION
HYDFAIL
RATEXTEND LIGHT
LIGHT
1.
HYD 1 EDP pressure falls below 1660 +/-
CAUTION
CAUTION
HYD1PRESS LIGHT
HYD2PRESS
LIGHT
MICRO
SWITCH
RESERVOIR
RESERVOIR
FCACCUM
FCACCUM
110
EDP
EDP
LAIL
PRIORITY
RAM
VALVE
AIR
H
RAIL
Y
TURBINE
EMERGENCY
D
BYPASS
PACKAGE
RESET 2
HAND
VALVE
ASSEMBLY
PUMP
STAB
a.
MSTR ALERT light flashes
SPDBRK
SLATS
LGEAR
NWS
FLAPS
LBAR
HOOK
b.
HYD 1 PRESS caution light illuminates
HYD1 PRESSURE
MECHANICAL
HYD2 PRESSURE
WHLBRKS
CHECKVALVE
PRESSURIZED WITH
FLAPEMERGENCY
RAT EXTENDED
SELECTOR/PRIORITY
ANDGATE
VALVE
ELECTRICAL
and caution tone sounds
HYDRAULIC SYSTEM BLOCK
DIAGRAM
c.
Hydraulic pressure is provided to flight
control services as long as HYD 2 (or
RAT) remains operational (to other
side of tandem actuators)
Overlay 1
2.
HYD 1 pressure falls below 1,500 psi
HYD 1 PRESS Caution Light
a.
If HYD 1 pressure drops below 1,500
Overlay 2
psi for any reason (pump failure,
HYD 1 Bypass Valve
excessive demand, engine flameout, or
leak in system), FC priority valve shuts
off general services distribution
Page 9-14
(8-03) Original
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