T-45A UJPT, E2-C2, ADV, & IUT Eng-09
Hydraulic System
E.
Emergency hydraulic system summary:
The emergency hydraulic system acts as a
backup to HYD 2 in the event of a HYD 2 EDP
fauilure. It is able to maintain sufficient pressure
in flight to power to the flight controls. RAT
deploys regardless of the condition of the HYD 1
and/or the HYD 2 EDP, whenever HYD 2
pressure decreases below 1,500 psi. The
following major components enable the
emergency hydraulic system to perform this
function: the ram air turbine (RAT), the RAT
accumulator, the HYD 2 reservoir, and the
emergency package assembly
WARNING: Sustained high-frequency, high
amplitude control inputs during flight with
RAT only hydraulic pressure could result in
loss of aircraft control. Ejection outside the
safe ejection envelope may occur if control
is lost during a landing attempt.
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