Hydraulic Subsystems
T-45C TS, ADV & IUT ENG-11
c.
Launch bar extension: will retract due to
mechanical (spring) pressure
d.
Arresting hook retraction
e.
Landing gear and MLG door retraction
f.
Slats: remain in position set when HYD 1 lost
B.
Electrical system
1.
28 VDC essential services bus
a.
Arresting hook (up/down proximity switches,
hook warning lights)
NOTE: The arresting hook itself is
mechanically controlled and gravity operated
with pneumatic assist. Even if batteries or the
essential services bus itself fails, the hook will
extend.
b.
Landing gear control (control and lights)
(1) If power to essential services bus fails,
normal gear extension not possible
(2) Emergency gear extension system
(mechanical) will still be operable
c.
Landing gear position indicator (light in handle)
d.
WOW control
e.
Anti-skid control: available with generator
failure
f.
Nose wheel steering: available with generator
failure
2.
28 VDC essential service bus: cannot extend
launch bar with total electrical failure; retraction
automatic due to spring force without commanded
(9-98) Change 4
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