LANDING GEAR

Question 1

Recall how to determine if parking brake pressure is low:

Answer 1

Brake Pressure as depicted on the Configuration SD
 White - Normal range
VOL. 2
14.10.4 50
 Amber – If below a predetermined low-pressure limit. Value is boxed.
 BRAKE PRES LO (CONFIG) - One or both brake accumulator pressures
are low

Question 2

Recall primary and secondary gear indications:

Answer 2

Gear Lights (LEFT, NOSE, RIGHT)
 Green - Landing gear is down and locked.
 Red - Respective landing gear is not locked in position corresponding to
position of gear handle.
Secondary Gear Indications (CONFIGURATION SD)
 White - Landing gear is up and locked.
 Green - Landing gear is down and locked.
 Red - Indicates one of the following:
- Landing gear is not down and locked and gear handle is down.
- Landing gear is in transit or not in agreement with gear handle.
- Any unsafe gear condition exists.
 Green and Red - Disagreement in position indicators or ANNUN LT TEST
Switch has been depressed.

Question 3

Recall which gear is used for ground shift sensing:

Answer 3

 The ground shift sensing mechanism is located on the nose gear

Question 4

Explain the function of the ANTISKID system:

Answer 4

Each brake system incorporates an anti-skid feature to allow maximum
wheel braking without skidding the tires.
 The anti-skid system also provides touchdown protection in flight, which
prevents brake application until after wheel spinup
.
 At low taxi speeds, the anti-skid system is automatically disabled to allow
manual braking.
 The anti-skid system is tested automatically whenever power is applied.
When a malfunction occurs, an associated anti-skid alert is displayed.

Question 5

Recall how braking is affected with a loss of both hydraulic systems:

Answer 5

Each main gear wheel is equipped with disc-type brakes operated by two
VOL. 2
14.20.3 51
independent hydraulic brake systems. Both hydraulic brake systems power
each brake assembly. The systems are synchronized to simultaneously
apply the brakes.
 Each is equipped with an accumulator of sufficient capacity to provide
brake pressure to stop the airplane, should both hydraulic systems fail.

Question 6

Explain how nose gear steering is affected by the use of the emergency
gear extension lever:

Answer 6

When the lever is raised, the right hydraulic system is isolated from the
landing gear. As a consequence, nose gear steering is restricted to the left,
even when both hydraulic systems are operating

Question 7

Recall the conditions which will allow the aural gear warning horn to be
silenced by pushing the GEAR HORN switch

Answer 7

GEAR HORN Button – Push: Silences landing gear warning horn and vocal
warning except when gear is not down and flaps are extended for landing; gear
must be down and locked to silence the warning.

Question 8

Recall how brake temperatures are depicted:

Answer 8

Brake Temperatures on the Configuration SD
Indicates a relative value of wheel brake temperature:
 White - Normal range
 Amber - Exceeds temperature limits. Value is boxed.
NOTE: After landing, brake temperature differential up to 60°C on the same
gear is considered normal

Question 9

Explain the purpose of the GEAR HANDLE RELEASE switch:

Answer 9

Push and Hold - Allows pilots to raise gear handle in the event of ground shift
system malfunction after takeoff

Question 10

Recall that the ANNUN LT TEST button also tests the gear unsafe
condition:

Answer 10

When the ANNUN LT TEST button is pushed, a warning horn and a voice
warning will sound to alert the crew of a gear unsafe condition.