Hydraulic Subsystems
T-45A UJPT, E2-C2, ADV, & IUT Eng-13
enough residual pressure to brake
the aircraft safely.
e.
Anti-skid system touchdown protection:
if pilot has pressure on brake pedals
before weight-on-wheels, anti-skid
system dumps all brake pressure to
system return to prevent locked wheels
(with resulting blown tires) upon
touchdown
f.
Operating parking brake handle
mechanically opens brake control
valve, routing system (or accumulator)
pressure simultaneously to both brake
units
NOTE: After engine shutdown, the
ANTI-SKID switch must be set to OFF
before setting the parking brake. If
anti-skid is left on and the battery
switches are turned on, pressure to the
parking brake may bleed off over a
period of time. Assumes HYD 1 is not
being pressurized from any other
source; i.e., while being refueled A/C
(old refueling panel), while
maintenance or ordnance checks out
electronic system.
g.
Brake control valve is mechanically
opened by de-spin actuator when
wheels-up is selected, applying
hydraulic pressure to wheel brake units
to stop wheels from spinning prior to
retracting gear into wheelwell
h.
Differential braking may be used to
steer aircraft if NWS is inoperative or
de-selected
4.
Limitations
a.
During acceleration at aircraft ground
speeds less than 30 kts, the system is(8-03) Original
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