Hydraulic Subsystems
T-45C TS, ADV & IUT ENG-11
e.
Enables AOA approach lights to flash when
HOOK BYPASS switch in CARRIER position
and hook not down
f.
Controls navigation mode display on HUD
(approach mode)
g.
Opens IPRSOV to enhance efficiency of ECS
h.
Required condition for the brake pressure
release system to activate
5.
Gear up and locked condition
a.
Monitored by airborne data recorder
b.
Gear position lighting
c.
Controls navigation mode display on HUD
(cruise mode)
d.
Closes IPRSOV
E.
Interface summary:
The hydraulic subsystems interface with the following
four basic aircraft systems: HYD 1, electrical system,
CWS, and the WOW sensors. Additionally, the position
of the landing gear affects the operation of various
aircraft systems.
All hydraulic subsystems are powered by HYD 1 hydraul-
ic pressure. If HYD 1 fails, the following subsystems rely
on emergency backup systems: landing gear/gear door
extension, forward NLG door closure, arresting hook
extension, wheel brakes, and flaps. The following sub-
system functions are no longer usable: NWS, anti-skid,
launch bar extension, arresting hook retraction, landing
gear/MLG gear door retraction and slats operation.
The hydraulic subsystems receive electrical power from
the 28 VDC essential services bus, and the 28 VDC
generator bus. The 28 VDC essential services bus
(9-98) Change 4
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