T-45A UJPT, E2-C2, ADV, & IUT Eng-26
Engineering Review
b.
Warning/caution light panel (WCP),
both cockpits
(1) HYD FAIL warning light: indicates
total hydraulic failure; illuminates
when HYD 1 pressure is less than
1660 +/- 110 psi, HYD 2 pressure
is less than 1,660 +/- 110 psi and
emergency hydraulic system pres-
sure is less than 600 +/- 50 psi,
indicating combined HYD 1,
HYD 2 and emergency hydraulic
system failure
(2) HYD 1 PRESS caution light:
warns aircrew of HYD 1 failure;
illuminates when HYD 1 EDP
pressure drops below
1660 +/- 110 psi, indicating HYD 1
EDP not maintaining pressure to
power flight controls and that all
hydraulic pressure to general
services has been lost; extin-
guishes when pressure rises
above 2,000 psi
NOTE: HYD 1, HYD 2, or the
Emergency hydraulic system, if
functioning, will back up each
other to provide pressure to oper-
ate flight controls.
(3) HYD 2 PRESS caution light alerts
aircrew to possible HYD 2 EDP
failure: illuminates when HYD 2
pressure drops below
1,660 +/- 110 psi. In some cases
this may be caused by excessive
demand. It extinguishes when
HYD 2 EDP pressure is above
2,000 psi
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(8-03) Original
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