T-45C TS, ADV & IUT ENG-27/ENG-28
Engineering Review
(d) To regain HYD 2 EDP pressure (and
stow the RAT), the HYD 2 RESET
button must be pressed
C.
Hydraulic system operational characteristics
Sg 6, fr 29
Hydraulic System
Normal System
1.
HYD 1 operational characteristics
Indications
a.
EDP receives hydraulic fluid from HYD 1
reservoir under low pressure and produces
output of 3000 psi
b.
HYD 1 failure signal to centralized warning
system (CWS) to illuminate HYD 1 caution
light when pressure drops below 600 + 50
psi. When HYD 1 pressure rises above
725 + 50 psi, HYD 1 caution light goes out
c.
Output of EDP is applied to power supply
package
d.
FC priority valve normally supplies hydraulic
pressure to both FC services and general
services distribution
e.
Flight control service
(1) Left and right aileron power control
units (PCUs): tandem hydraulic
cylinders, one side supplied by HYD 1
and other by HYD 2 (HYD 1 supplies
forward side of aileron PCUs; HYD 2
supplies aft side)
(2) Stabilator PCU (also a tandem PCU)
(3) System redundant with HYD 2
f.
General services
(1) Landing gear (hydraulic pressure used
for both extension and retraction)
(9-98) Original
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