T-45C TS, ADV & IUT ENG-27/ENG-28
Engineering Review
(1) HYD 1, HYD 2, and BRAKE pressure
gauges (left console, both cockpits)
(2) HYD 2 RESET button: located on the left
console, forward of the throttle. Pressing
the button with HYD 2 EDP pressure above
1800 psi closes the HYD 2 system bypass
valve after engine start/restart or airstart
and retracts the RAT if deployed
(3) Warning/caution light panel (WCP), both
Sg 6, fr 38
cockpits
Warning and Caution
Advisory Light Panels
(a) HYD FAIL warning light: indicates total
hydraulic failure; illuminates when HYD
1 pressure is less than 600 + 50 psi,
HYD 2 pressure is less than 1660 +
110 psi and emergency hydraulic
system pressure is less than 600 + 50
psi, indicating combined HYD 1, HYD
2 and emergency hydraulic system
failure
(b) HYD 1 PRESS caution light: warns
aircrew of HYD 1 failure; illuminates
when HYD 1 EDP pressure drops
below 600 + 50 psi, indicating HYD 1
EDP not maintaining pressure to
power flight controls and that all
hydraulic pressure to general services
has been lost; extinguishes when
pressure rises above 725 + 50 psi
NOTE: HYD 1, HYD 2, or the
Emergency hydraulic system, if
functioning, will back up each other to
provide pressure to operate flight
controls.
(c) HYD 2 PRESS caution light alerts
aircrew to possible HYD 2 EDP failure:
illuminates when HYD 2 pressure
drops below 1660 + 110 psi. In some
(9-98) Original
Page 27-59
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