ATR 42-500, Manual

Page: 94 / 129

O - Landing gear
p. 93
GEAR HANDLE RED LIGHT
any gear not sensed down and
locked with some conditions.
CAP.
System 1
UNLK gear not locked in selected
position or (on GND) uplock box
not opened.
Green Lt down lock engaged.
OFF
Pb released, system deactivated
F (FAULT)
wheel channel failure. CAP
EMERGENCY BRAKE HANDLE
permits to apply a metered pressure.
The brake accumulator allows at least six
braking applications without any antiskid
operation if the blue hydraulic system is
not available)
BRK TEMP
HOT Any brake T° > 160°C
TEST pb
(inhibited if speed > 17 kts)
= MC + SC CAP 4F amber lt.
Test duration: 3 sec. in flight and
6 sec. on ground
ANTISKID
Operative if speed > 10 kts.
Activates when speed > 23 kts + 50%
diff between wheels (locked wheel
protection).
Braking action inhibited at touchdown as
long as wheel spin up speed < 35 kts or
5 sec. (touchdown protection).
CAUTION: THE TEST INHIBITS BRAKES
PARKING BRAKE
permits a full pressure on the brakes. When brake
handle is not in the fully released position, amber
PRKG BRK caution light illuminates on CAP and is
taken into account by the T/O CONFIG.
(Springloaded to the off position)
System 2
UNLK gear not locked in selected
position or (on GND) uplock box
not opened.
Green Lt down lock engaged
N/W STEERING SW
activates or deactivates the nose wheel
steering system (guarded type in the ON
position)
OFF: unpressurizes the steering system
(91° of deflection)
LDG GEAR EMERGENCY
EXTENSION HANDLE
permits to unlock the landing gear
3. LDG GEAR position indicators
ATA 32
4. Landing gear handles
ATA 32
5. Brakes temperature
ATA 32
and antiskid
6. Emergency parking
ATA 32
brake handle
7. Steering handwheel
ATA 32
THE STEERING HAND WHEEL
controls the nose wheel angle up to 60° in
either direction:
– clockwise: steering to the right
– counter clockwise: steering to the left