T-45C TS, ADV & IUT ENG-12
Hydraulic Subsystems Malfunctions
V. Anti-skid failure
Fig 4: Wheel Brake/
Anti-Skid System
A. Indications
Operation
1. MASTER ALERT light flashes
2. Caution tone sounds in headsets
3. SKID caution light illuminated
B. Verifications: same as indications
C. Effects on flight safety
1. Touchdown protection mode (2-second wheel brake lockout) of
ANTI-SKID system will be inoperative
2. Stopping distance increases and arrested landing may be required
VI. Parking brake failure
Fig 4: Wheel Brake/
Anti-Skid System
A. Failure to engage
Operation
1. Indications: aircraft fails to hold ground position
NOTE: The parking brake may be used as a backup to the wheel
brakes when taxiing in the event of a wheel brake failure.
2. Verifications: wheel brake/emergency flap accumulator pressure
gauge indicates 1300 to 3000 psi
3. Effects on safety
a. If parking brake failure combines with wheel brake failure,
aircraft braking system has failed completely
b. Alternative methods of securing aircraft ground position will be
required
B. Failure to disengage
1. Indications
a. Aircraft fails to roll properly with parking brake handle
disengaged
Note: There are no secondary indications on the warning
caution advisory panels of a parking brake failing to disengage.
2. Verifications: parking brake control set to disengage
3. Effects on safety: difficult or impossible to move aircraft without
assistance
(9-98) Original
Page 12-9
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