14. Landing Gear

Question 1

Recall applicable CONFIGURATION SD synoptic symbology and color-coding

Answer 1

Brake Pressure

White - Normal range

Amber - Below low pressure limit

Secondary Gear Indicators

White - Gear up and locked

Green - Gear down and locked

Red - Any unsafe gear condition exists (disagreement, gear in transit, etc)

Green and Red – Disagreement in position or ANNUN LT TEST switch has been pressed

Brake Temperature

White – Normal range

Amber - Exceeds temperature limits

Question 2

Recall the function of Gear Horn button

Answer 2

Push – Silences landing gear warning horn and vocal warning (gear must be down and locked) Exception: Gear is not down and landing flaps are extended

Question 3

Recall primary and secondary gear position indications

Answer 3

Landing gear positions are indicated by the primary gear position lights and/or the secondary landing gear position indicators on the CONFIGURATION synoptic

A set of three green gear light indications on either the gear position lights on the instrument panel or the gear position indicators on the CONFIGURATION synoptic constitute a gear down and locked

Question 4

Recall the maximum brake temperature for takeoff

Answer 4

Brake temperature must not exceed 115°C for airport elevations up to

2,200 feet MSL

Note: Temperature limits are based on a 120K pound aircraft and a V1 of 140 knots. To confirm actual brake temperature limits based on different conditions, reference ODM

Question 5

Recall indications of a brake overheat

Answer 5

Master Caution

BRAKE OVERHEAT level 1 message - EAD and Config SD

Note: After landing, brake temperature differential up to 60°C on the same gear is considered normal

Question 6

Recall indications of Low Brake Pressure

Answer 6

Master Caution

BRAKE PRESS LO level 1 message - EAD and Config SD

Question 7

Recall how to determine the Parking Brake is set

Answer 7

The parking brake is set by pushing the brake pedals, lifting the PARK BRAKE knob and releasing the brake pedals

 When the parking brakes are set, the PARK BRAKE ON alert is displayed on the EAD

Question 8

Recall aircraft turn capabilities with the nose gear steering wheel and rudder pedals

Answer 8

Rudder Pedals – Full deflection provides up to 17 degrees turn capability in either direction

Nose Gear Steering Wheel – Overrides the rudder pedal steering and provides up to 82 degrees of turn in either direction

Question 9

Recall features of the aircraft Ground Shift Sensing system

Answer 9

Located on aircraft nose gear

 Signals various airplane systems as to whether the airplane is on the ground or in flight

 Inability to raise the gear due to a failed ground shift sensor can be overridden after takeoff by the gear handle release switch

Push and Hold – Landing gear handle can be raised in the event of a ground shift system malfunction after takeoff

Question 10

Recall the location and operation of the Emergency Gear Extension Lever

Answer 10

When the lever is raised and latched, the landing gear will free fall to the down and locked position

The emergency gear extension lever is located in the floor on the right side of the pedestal and is used to extend the gear if the normal method fails

Question 11

Recall cautions associated with ground operations when landing after an Emergency Gear Extension.

Answer 11

When the Emergency Gear Extension 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

 Stop airplane on runway

Close and latch the main gear doors manually

 Verify landing gear pins are installed prior to taxi or tow

Question 12

Recall how braking is effected with a loss of both hydraulic systems

Answer 12

Each main gear wheel is equipped with disc-type brakes operated by two independent hydraulic brake systems

 Both hydraulic brake systems power each brake assembly

 Should both hydraulic systems fail, each system is equipped with an accumulator of sufficient capacity to provide brake pressure to stop the airplane

Question 13

Recall features of the antiskid system

Answer 13

Allows maximum wheel braking without skidding the tires

 Prevents brake application until after main wheel spinup

 Automatically disabled at low taxi speed

 Automatically tested when power is applied

Question 14

Recall the function of the ANTISKID switch

Answer 14

ON – Activates antiskid system

OFF – Deactivates antiskid system

Question 15

Recall indications of an Anti-Skid failure

Answer 15

Anti-skid switchlight illuminated

ANTISKID OFF messages on EAD and Config SD

ANTISKID FAULT on Status SD

Master caution