T-45A UJPT, E2-C2, ADV, & IUT Eng-09
Hydraulic System
b.
Functional: produces hydraulic
pressure for emergency hydraulic
system in event of HYD 2 EDP
pressure loss
c.
Physical
(1) Consists of a variable pitch tur-
bine, speed sensor, and fixed
displacement hydraulic pump
NOTE: The RAT utilizes HYD 2
reservoir fluid to provide power for
the emergency hydraulic system.
(2) Mounted on hinged support leg
(3) Raised into airstream automati-
cally by hydraulic actuator when
HYD 2 EDP pressure drops below
1,500 psi
(4) Output volume and pressure vary
with pump speed (fixed displace-
ment pump)
(5) Speed limited by internal governor
to 7,300 rpm
2.
RAT accumulator
Overlay 2
RAT Accumulator
a.
Location: RAT bay, aft side
b.
Description: carries nitrogen preload
and provides hydraulic pressure to
extend, and keep fully extended, the
RAT actuator when HYD 2 EDP
pressure drops below 1,500 psi
c.
Functional
(1) Stores hydraulic fluid under pres-
sure to raise the RAT in event of
HYD 2 pressure drop
Page 9-27
(8-03) Original
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