Hydraulic Subsystems
T-45A UJPT, E2-C2, ADV, & IUT Eng-13
WARNING: Inoperative nose
wheel steering may be caused
by a steering system failure or a
weight-on-wheels switch failure.
A system failure airborne should
be indicated by a NWS caution
light. On deck it may only be
indicated by a lack of NWS
control without a corresponding
caution light. Inoperative NWS
caused by a weight-on-wheels
switch failure may be indicated
by continuous illumination of
the AOA indexers on deck.
d.
NOSE WHL STR advisory light
(1) Location: advisory panel, both
cockpits
(2) Purpose: on when NWS high gain
selected
e.
Rudder pedals: provide
electromechanical directional input to
NWS to control direction of aircraft
3.
Operating characteristics 1.4.9.2.1
a.
Electrically controlled (28 VDC
essential bus), hydraulically operated
NOTE: NWS control box contains an
AC inverter to supply a small amount of
26 VAC power required by NWS.
b.
Full time, dual gain
(1) Low gain: +/- 12 degrees nose
wheel movement
(a) On and latched whenever
aircraft is on deck. During
landing, nose wheel steering
Page 13-36
(8-03) Original
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