Hydraulic Subsystems
T-45A UJPT, E2-C2, ADV, & IUT Eng-13
(b)
Pre-existing aircraft
components used by the
system include the 95%
throttle position proximity
switch, the right and left main
landing gear down and locked
proximity switches, launch bar
proximity switch, anti-skid
valve, parking brake handle
proximity switch, and NWS
button
(c) Brake pressure release
system designed to release
brake pressure through
existing anti-skid valve,
independent of anti-skid
control box
(2) Controls and indicators
(a) System commanded brake
release is automatically
provided when a combination
of specific conditions are met.
The system engages when it
detects left main LDG GEAR
down and locked and launch
bar EXTENDED with
LAUNCH BAR switch in the
RETRACT position. Once
engaged, the system then
monitors 95% throttle position,
left main LDG GEAR down
and locked condition, NWS
button relays, and parking
brake handle position to
determine normal brake
operation or system
commanded brake release
(b) BRK PRESS caution light
(i)
Location: caution/
Page 13-28
(8-03) Original
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