Hydraulic Subsystems
T-45C TS, ADV & IUT ENG-11
(7) NLG forward doors are driven to near
closed position (3-5 degrees from full
closed) by electromechanical actuator
powered by 28 VDC essential bus when
emergency gear handle is pulled and
NLG clears the forward doors
CAUTION: If the landing gear is
emergency extended, hydraulic
pressure will not be supplied to the nose
wheel steering and the system will be
inoperative.
(8) Gear cannot be raised with the EMER
GEAR handle
NOTE: Once down and locked, the gear
cannot be retracted unless HYD 1 power
returns.
NOTE: The LDG GEAR DOOR caution
light will remain illuminated when the gear
is lowered using the EMER GEAR handle.
(9) If electrical power is available, cockpit gear
down-and-locked lights (LDG GEAR NOSE,
LEFT, and RIGHT) are functional whether
either normal or emergency gear extension
is used. This also applies to door lights, i.e.,
doors will not retract (close) and light stays
on
D.
Limitations
1.
Maximum airspeed for lowering gear and flying with
gear extended: 200 KIAS
2.
Landing gear retract command is disabled unless
nose strut extended and nose wheel centered
a.
Strut extension normally centers nose wheels
mechanically with centering cams
b.
Nose wheel steering (NWS) automatically
centers nose wheel if cams fail to do so
(9-98) Original
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