T-45C TS, ADV & IUT ENG-27/ENG-28
Engineering Review
cases this may be caused by
excessive demand. It extinguishes
when HYD 2 EDP pressure is above
2000 psi.
NOTE: As long as the HYD 2 pressure
gauge is cycling between 2500 and
3000 psi, the emergency hydraulic
system is functioning and is producing
hydraulic pressure to power the flight
controls. Loss of HYD 2 fluid will
render the HYD 2 and the emergency
hydraulic system inoperative. A
subsequent loss of the HYD 1 system
will result in loss of control of the
aircraft.
NOTE: The capability of the RAT to
provide sufficient hydraulic power for
controllable flight during a total
hydraulic pressure loss has not been
determined. Safe ejection envelopes
may be exceeded if control is lost
during a landing attempt on emergency
hydraulic power. Landing approaches
on emergency hydraulic power alone
should not be attempted.
b.
Checking/testing the hydraulic system
Sg 6, fr 39
(1) Right main wheelwell
Wheel Brake/
Emergency Flap
Accumulator Pressure
(a)
Wheel brake/emergency flap
Gauge
accumulator pressure gauge
(i)
Indicates pressure in wheel brake/
emergency flap accumulator
(same measurement as cockpit
BRAKE pressure gauge)
(ii) Calibrated from 0 to 4000 psi in
100 psi increments and labeled
every 1000 psi
(9-98) Original
Page 27-60
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